Section A Forces And Motion

Question 1

What is the equation linking velocity, distance and time?

Answer 1

Velocity= distance/time

Question 2

What is the equation linking acceleration, velocity and time?

Answer 2

Acceleration= (final velocity- initial velocity)/ time taken

Question 3

What does deceleration mean?

Answer 3

Slowing down

Question 4

What does it mean when in an acceleration graph, the line is horizontal?

Answer 4

The object has stopped moving.

Question 5

What does it mean in a velocity graph, when the line is horizontal?

Answer 5

The object is at steady speed.

Question 6

How do you calculate the gradient?

Answer 6

Gradient = vertical/horizontal

Question 7

What is the equation linking speed distance and time?

Answer 7

Speed= distance/time

Question 8

What is instantaneous speed?

Answer 8

The speed any given instance within that span of time.

Question 9

What is speed?

Answer 9

A scalar quantity; distance travelled divided by time without regard to direction.

Question 10

What is velocity?

Answer 10

A vector quantity, meaning it’s speed in a specified direction.

Question 11

How do you calculate the acceleration?

Answer 11

Acceleration = Gradient = Vertical/Horizontal

Question 12

What is an unbalanced force?

Answer 12

A force that is not balanced by a force in the opposite direction.

Question 13

What is the equation linking force, mass and acceleration?

Answer 13

F = m x a
a = F / m
m = F / a

Question 14

What is the acceleration on Earth?

Answer 14

10 m/s2

Question 15

What is the acceleration on the Moon?

Answer 15

1.6 m/s2

Question 16

What is the unit for measuring acceleration?

Answer 16

m/s2

Meters per second(s) squared

Question 17

What is the equation linking momentum, mass and velocity?

Answer 17

momentum (kg m/s) = mass (kg) x velocity(m/s)

p = m x v

Question 18

What are the units for momentum?

Answer 18

kg m/s

Question 19

What number do you have to divide by to turn km/h to m/s?

Answer 19

3.6

Question 20

What is an elastic collision?

Answer 20

In an elastic collision, the total kinetic energy of the colliding bodies is conserved, i.e. unchanged by the collision.

Question 21

An example of an elastic collision?

Answer 21

Gas particles

Question 22

What is a partial elastic collision?

Answer 22

When the object colliding with another but then reverts to its original shape, but loses energy from the collision.

Question 23

An example for a partial collision?

Answer 23

A ball bouncing off a wall.

Question 24

What is an inelastic collision?

Answer 24

When two object stick together and maintain the shape the force has put upon it.

Question 25

Give an example of an inelastic collision?

Answer 25

Car crash.

Question 26

What is the first law of motion?

Answer 26

Balanced forces mean no change in velocity.

Question 27

What is the second law in motion?

Answer 27

A resultant force means acceleration.

Question 28

What is the unit for gravitational field strength?

Answer 28

N/kg

Newtons per kilogram