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(BEMB) x (HCIF) > Review 4 (Linear Kinematics) > Flashcards

Review 4 (Linear Kinematics) Flashcards

1
Q

It takes a swimmer 1 hour to cross a lake that is 1 km wide. Which of the following is true of the swimmer’s acceleration?

Question options:

1) It cannot be determined from the information given.

2) It is equal to velocity squared.

3) It is 1 km/hr.

4) It is 1 km/hr2.

A

It cannot be determined from the information given.

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2
Q

Which of the following is NOT a kinematic quantity?

Question options:

1) Distance

2) Acceleration

3) Force

4) Displacement

A

Force

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3
Q

A ball rolling across a field with an acceleration of -0.5 m/s2 rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball’s initial speed?

Question options:

1) 12.5 m/s

2) 4 m/s

3) 6.25 m/s

4) 16 m/s

A

4 m/s

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4
Q

A ball is kicked with an initial velocity of 10 m/s at an angle of 30°. Neglecting air resistance, which is the speed of the ball at landing?

Question options:

1) 10 m/s

2) 10 m/s multiplied by the sine of 30 degrees

3) 10 m/s multiplied by the cosine of 30 degrees

4) None of the above

A

10 m/s

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5
Q

The meter is the unit of measurement for which of the following?

Question options:

1) Distance

2) Distance and Displacement

3) Speed

4) Displacement

A

Distance and Displacement

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6
Q

Which quantity is calculated as the inverse of speed?

Question options:

1) Acceleration

2) Pace

3) Velocity

4) None of the above

A

Pace

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7
Q

Which of the following is/are used to indicate direction of displacement?

Question options:

1) Negative

2) North

3) Right

4) All of the above

A

All of the above
(Negative) , (North) , (Right)

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8
Q

If velocity is constant, then acceleration is which of the following?

Question options:

1) Need more information

2) Constant, but not necessarily zero

3) Zero

4) Changing

A

Zero

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9
Q

What is the average velocity of a cyclist who covers 5 km in 30 minutes?

Question options:

1) 5 km/hr

2) 10 km/hr

3) 60 km/hr

4) 30 km/hr

A

10 km/hr

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10
Q

If acceleration is constant and positive, what is the velocity?

Question options:

1) Increasing

2) Decreasing

3) Need more information

4) Zero

A

Increasing

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11
Q

Which of the following is/are true regarding the apex in the trajectory of a projectile?

Question options:

1) It is the highest point in the flight.

2) Vertical velocity is 0.

3) Direction changes.

4) All of the above.

A

All of the above
(It is the highest point in the flight) , (Vertical velocity is 0) , (Direction changes)

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12
Q

Which of the following affects the time that a horizontally projected object remains in the air?

Question options:

1) Mass

2) Projection height

3) Weight

4) All of the above

A

Projection height

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13
Q

Which of the following statements is true regarding objects projected from the same level as they land?

Question options:

1) Time up and time down are equal.

2) Angle of decent is equal to angle of takeoff.

3) Both statements are true.

4) Neither of the statements is true.

A

Both statements are true
(Time up and time down are equal) , (Angle of decent is equal to angle of takeoff)

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14
Q

When final velocity is larger than initial velocity, the acceleration is:

Question options:

1) Average

2) Positive

3) Zero

4) Negative

A

Positive

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15
Q

Why does running downhill tend to increase running speed?

Question options:

1) Increased stride length

2) Increased stride frequency

3) Both increased stride length and frequency

4) None of the above

A

Increased stride length

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16
Q

Linear distance traveled per unit of time describes which of the following?

Question options:

1) Displacement

2) Speed

3) Velocity

4) Acceleration

A

Speed

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17
Q

Why do elite long jumpers have take-off angles far less than the optimal 45°?

Question options:

1) Take-off velocity is higher during lower take-off angles

2) Relative take-off height is zero

3) Both A and B

4) None of the above

A

Take-off velocity is higher during lower take-off angles

18
Q

The shape of a projectile’s trajectory is influenced by which of the following?

Question options:

1) Speed of projection

2) Angle of projection

3) Air resistance

4) Speed of projection and air resistance

A

Speed of projection and air resistance

19
Q

What factor(s) distinguishes elite sprinters from non-elite performers?

Question options:

1) Stride length

2) Stride frequency

3) Both stride length and frequency

4) None of the above

A

Stride frequency

20
Q

A ball is tossed vertically upward from a height of 2 m with an initial velocity of 10 m/s. Just before the ball hits the ground, its velocity will be which of the following?

Question options:

1) 10 m/s

2) Less than 10 m/s

3) Greater than 10 m/s

4) Not possible to predict

A

Greater than 10 m/s

21
Q

The laws of constant acceleration can be applied to which of the following?

Question options:

1) Horizontal component of projectile motion

2) Vertical component of projectile motion

3) Resultant of projectile motion

4) Horizontal and vertical components of projectile motion

A

Horizontal and vertical components of projectile motion

22
Q

In which of the following track events is distance most likely equal to displacement?

Question options:

1) 100 m dash

2) 200 m dash

3) 400 m dash

4) 5K road race (starting line is finish line)

A

100m dash

23
Q

If the velocity of a sailboat changes from 4 m/s to 2 m/s over a period of time, which of the following is true of the sailboat’s acceleration?

Question options:

1) It is equal to zero.

2) It is positive.

3) It is equal to 2 knots/hr.

4) It is negative.

A

It is negative.

24
Q

Which of the following factors typically exerts the most influence on the horizontal displacement obtained by a projectile?

Question options:

1) Projection angle

2) Relative height of projection

3) Initial speed of projection

4) Initial acceleration of projection

A

Initial speed of projection

25
Q

Which of the following represents vertical acceleration of a projectile?

Question options:

1) –9.81 m/s

2) 0 m/s2

3) 0 m/s

4) –9.81 m/s2

A

–9.81 m/s2

26
Q

Which of the following components of projectile is affected by gravity?

Question options:

1) Vertical component

2) Both horizontal and vertical components

3) Depends on the individual situation

4) Horizontal component

A

Vertical component

27
Q

A runner moving at a velocity of 6 m/s increases the velocity in a 2 s time interval to a rate of 10 m/s. Which of the following is the rate of acceleration?

Question options:

1) 4 m/s^2

2) -2 m/s^2

3) 4 m/s

4) 2 m/s^2

A

2 m/s^2

28
Q

Neglecting the effect of air resistance, which of the following is/are true regarding the horizontal component of projectile velocity?

Question options:

1) Remains constant throughout flight

2) Changes according to gravitational acceleration

3) Equals to 0

4) None of the above

A

Remains constant throughout flight

29
Q

When a long jump performance is analyzed, which of the following is likely to be of the most interest?

Question options:

1) The average velocity of the jumper during the run-up

2) The instantaneous velocity of the jumper at takeoff

3) The average velocity of the jumper during the flight

4) The instantaneous velocity of the jumper at landing

A

The instantaneous velocity of the jumper at takeoff

30
Q

Which of the following is/are scalar quantity(ies)?

Question options:

1) Displacement

2) Distance

3) Speed

4) Distance and speed

A

Distance and speed

31
Q

Once a projectile is airborne, it is affected by which of the following?

Question options:

1) Gravity

2) Release velocity

3) Air resistance and gravity

4) Air resistance

A

Air resistance and gravity

32
Q

Which of the following represents horizontal acceleration of a projectile?

Question options:

1) 0 m/s

2) –9.81 m/s^2

3) –9.81 m/s

4) 0 m/s^2

A

0 m/s^2

33
Q

A runner completes 1 full lap around a 400 meter track. What is her displacement?

Question options:

1) Need more information

2) 400 meters

3) Zero

4) 400 meters X 2π

A

Zero

34
Q

Runner #1 changes her velocity from 8 m/s to 11 m/s. Runner #2 changes hers from 7 m/s to 10 m/s. Who has the higher acceleration?

Question options:

1) Runner #1

2) Runner #2

3) Both have same acceleration

4) Need more information

A

Need more information

35
Q

The negative sign in front of the acceleration due to gravity (-9.81 m/s2) can mean which of the following?

Question options:

1) The projectile is traveling down and speeding up (negative direction)

2) The projectile is traveling up and slowing down (negative acceleration)

3) Both A and B

4) None of the above

A

Both A and B
The projectile is traveling down and speeding up (negative direction) & The projectile is traveling up and slowing down (negative acceleration)

36
Q

In a 5K road race, the finish line is also the starting line. What does 5K represent?

Question options:

1) Velocity

2) Speed

3) Distance

4) Displacement

A

Distance

37
Q

Vector mechanics apply to which of the following?

Question options:

1) Displacement and Velocity

2) Speed

3) Velocity

4) Displacement

A

Displacement and Velocity

38
Q

Which of the following is an example of projectile motion?

Question options:

1) A badminton shuttlecock during flight

2) A long jumper while in the air

3) Both A and B

A

Both A and B
(A badminton shuttlecock during flight) & (A long jumper while in the air)

39
Q

In the formula v2 = v1, which of the following is known about acceleration?

Question options:

1) Need more information

2) Acceleration = 0 m/s^2

3) Acceleration = –9.81 m/s^2

A

Acceleration = 0 m/s^2

40
Q

The Greek letter Δ (delta) is typically used to represent which of the following?

Question options:

1) Distance

2) Displacement

3) Time

4) Change in

A

Change in

(BEMB) x (HCIF) (32 decks)

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