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yuh Flashcards

1
Q

Force

A

any push or pull on other object

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2
Q

Inertia

A

The propernty of an object that reisist change in motion

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3
Q

Newton

A

SI unit of force

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4
Q

Net force

A

The combination of all forces acting on an object

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5
Q

Newtons First last

A

an object at
rest will stay at rest and an object in
motion will continue in motion with the
same velocity unless acted on by an
outside force

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6
Q

NEWTON’s Second Law

A

relates
the net force acting on an object to
its mass and acceleration

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7
Q

WEIGHT

A

the force of gravity
acting on an object

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8
Q

AIR RESISTANCE

A

a force that acts
against the force of gravity on an object in
free fall

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9
Q

NEWTON’s Third Law

A

whenever
one object exerts a force on another
second object exerts an equal and
opposite force on the first

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10
Q

MASS

A

the amount of matter an
object is made of

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11
Q

ACCELERATION

A

the rate at which velocity
changes; an object accelerates if its speed
changes, if its direction changes, if its
direction changes and if both speed and
direction changes

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12
Q

FRICTION

A

a force that opposes
motion between two object that are
touching

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13
Q

Which statement illustrates Newton’s first law?
a stone will not move unless something pushes or pulls it.
a ball rolling across the floor eventually slows down
as a car comes to a stop, the passengers continue to move forward
all of the above

A

All of the above

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14
Q

Which object has the greatest inertia?
a tennis ball
a beach ball
abowling ball
a volleyball

A

A bowling ball

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15
Q

What force causes a skater sliding on the ice to gradually slow down? balanced force
friction
inertia
acceleration

A

friction

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16
Q

A seat helps you when your car stops suddenly by providing a(n)
balanced forward force
balanced backward force
unbalanced forward force
unbalanced backward force

A

unbalanced backward force

17
Q

One newton is the force that can give a mass of 1 kg an acceleration of
1 m/s
9.8 m/s
1 m/s2
9.8 m/s2

A

1 m/s2

18
Q

Which of the following will result in the greatest acceleration?
56 N acting on a 1 kg box
c. 23 N acting on a 2 kg box
56 N acting on a 2 kg box
d. 23 N acting on a 5 kg box

A

56 N acting on a 1 kg box

19
Q

What unbalanced force is needed to give a 976 kg vehicle an acceleration of 2.50 m/s2?
2240 N
c. 22240 N
240 N
d. 2440 N

A

2440 N

20
Q

A force of 240.0 N causes an object to accelerate at 3.2 m/s2. What is the mass of the object?
0.013 kg
b. 75 kg
c. 240 kg
d. 768 kg

A

768 kg

21
Q

A 0.25 kg steel ball experiences a net force of 1. 15 N as it rolls down a ramp. What is the
acceleration of the ball?
0.29 m/s2
b. 0.90 m/s2
c. 1.4 m/s2
d. 4.6 m/s2

A

d. 4.6 m/s2

22
Q

If an equal force is applied to two cars an equal mass, CAR A and CAR B,
CAR a will have ________________ acceleration as (than) CAR B.
the same
b. greater
c. less
d. opposite

A

the same

23
Q

The gravitational force between two objects depends on masses of objects and
accelerations of objects
c. speeds of objects
distance between objects
d. sizes of objects

A

distance between objects

24
Q

Which of the following objects exerts a gravitational force?
a bowling bowl
c. a feather
a book
d. all of the above

A

all of the above

25
Q

Increasing which of these conditions results in more gravitational force between two objects?
distance
b. acceleration
c. mass
d. surface area

A

Mass

26
Q

When an object is in free fall, the only force acting on it is
gravity
c. inertia
friction
d. terminal velocity

A

gravity

27
Q

Whenever a force is exerted, another force occurs that is _________ in size, and ______ in
direction.
equal, same
c. equal, opposite
smaller, same
d. smaller, opposite

A

c. equal, opposite

28
Q

Car suddenly stops and you strain against the seatbelt.

A

1ST LAW OF INERTIA

29
Q

The difficulty of pushing a car that won’t start

A

1ST LAW OF INERTIA

30
Q

Hitting a softball, the harder hit the faster the goes ball

A

2ND LAW OF ACCELERATION

31
Q

Loaded versus an unloaded truck

A

2ND LAW OF ACCELERATION

32
Q

Two car hits head on

A

3RD LAW OF ACTION REACTION

33
Q

Astronaut in space

A

3RD LAW OF ACTION REACTION

34
Q

Football players and their position

A

2ND LAW OF ACCELERATION

35
Q

Car turns left and you appear to slide to the right

A

1ST LAW OF INERTIA

36
Q

Jumping out of a boat onto a dock

A

2ND LAW OF ACCELERATION

37
Q

A skateboard moves faster in the same direction it is pushed

A

2ND LAW OF ACCELERATION

phyics (1 decks)

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