Motion - Overall Study

Question 1

Define velocity

Answer 1

Change in displacement divided by change in time

Question 2

What is the equation for acceleration?

Answer 2

Acceleration = change in speed/time taken

= v2-v1/t

Question 3

Name an action-reaction pair

Answer 3

Gravity normal force
Pushing against a wall wall pushing back
Other examples can be added

Question 4

At what rate does Earth pull objects to its centre due to gravity?

Answer 4

9.8m/s^2

Question 5

What equation can you generally use to calculate weight?

Answer 5

F=mg
F=Force (gravity)
m=mass
g=acceleration due to gravity

Question 6

What two things determine weight?

Answer 6

Mass and gravity

Question 7

What three statements can be created from F=ma

Answer 7

1. The more massive the object, the greater the force needed to accelerate it
2. The greater the force applied, the quicker it will accelerate
3. If the same force is applied to a more massive object, the acceleration will be less.

Question 8

How else can Newton’s second law of motion be written?

Answer 8

F=ma

Question 9

Say someone is not wearing a seatbelt in a head-on collision, what is likely to occur?

Answer 9

They will likely fly through the front window of a car/vehicle

Question 10

Where is a common place where inertia is felt?

Answer 10

Car, bus, plane, vehicle, rollercoaster etc.

Question 11

What is another term for Newton’s first law of motion?

Answer 11

Inertia

Question 12

Can the distance travelled from a speed-time graph be calculated? If so, how?

Answer 12

Yes. By finding the area under the speed-time graph

Question 13

What does a speed-time graph show?

Answer 13

The speed of a travelling object as time pases

Question 14

What does a displacement-time graph show?

Answer 14

How far an object moves from its starting point over a period of time.

Question 15

How do you calculate the gradient within a graph?

Answer 15

Rise/run

Question 16

What does a distance-time graph show?

Answer 16

How far an object moves as time progresses

Question 17

TRUE or FALSE

The acceleration of something can be a negative number.

Answer 17

True

Question 18

What is the equation for average speed?

Answer 18

Speed (m/s or km/h) = distance travelled/time taken

v = d/t

Question 19

What is the equation for average velocity?

Answer 19

Average velocity = displacement/time taken

–>v = –>d/t

Question 20

How many seconds are in 1 hour?

Answer 20

3600

Question 21

What are the SI Units for:

1. Length
2. Time
3. Mass

Answer 21

1. meters
2. seconds
3. kilograms

Question 22

Define Newton’s third law of motion.

Answer 22

For every action, there is an equal and opposite reaction

Question 23

Define weight

Answer 23

your mum

The weight of an object is the force of gravity on the object and is defined as the mass times acceleration of gravity: w=mg

Question 24

Define mass

Answer 24

Mass is the quantity of matter in a body regardless of its volume or any of the forces acting upon it.

Question 25

Define Newton's second law of motion.

Answer 25

An object acted upon by a force experiences acceleration in the same direction and proportional to the magnitude of the net force, and inversely proportional to the mass of the object. F=ma

Question 26

Define net force

Answer 26

The sum of all the forces acting on an object

Question 27

Define force

Answer 27

Any interaction that, when unopposed, will change the motion of an object

Question 28

Define inertia

Answer 28

A property of matter that keeps something in the same position or moving in the same direction unless acted upon by an external force.

Question 29

Define Newton's first law of motion.

Answer 29

an object will remain at rest or in uniform motion in a same direction unless acted upon by an external force

Question 30

Define origin

Answer 30

The point at which the axes of a coordinate system intersect

Question 31

Define gradient

Answer 31

The gradient of the graph is the rise over the run

Question 32

Define constant speed

Answer 32

When an object is travelling at the same speed and is not accelerating or decelerating.

Question 33

Define deceleration

Answer 33

When an object is slowing down

Question 34

Define acceleration

Answer 34

An object has acceleration when its velocity changes. Average acceleration equals change in velocity divided by the time taken. The most common unit is m/s

Question 35

Define instantaneous speed.

Answer 35

The speed at any particular instant

Question 36

Define average speed

Answer 36

Change in distance divided by change in time; usually measured in km/h or m/s

Question 37

Define speed

Answer 37

Change in distance divided by time

Question 38

Define displacement

Answer 38

How far you are from where you started and what direction you are from where you started

Question 39

Define distance

Answer 39

Total distance travelled