Motion

Question 1

The steeper the line?

Answer 1

The greater speed it represents

Question 2

Speed equals?

Answer 2

D/t

Question 3

What’s the speed of a runner who covers 400m in 50s?

Answer 3

8m/s

Question 4

Distance and time are on what axis?

Answer 4

Distance- y

Time- x

Question 5

If an object is stationary the line on the DT graph is?

Answer 5

Horizontal

Question 6

If the velocity of an object changes we say that it ………?

Answer 6

Accelerates

Question 7

The velocity of an object is…?

Answer 7

It’s speed in a given direction

Question 8

What’s the difference between speed and velocity?

Answer 8

Velocity is speed in a particular direction

Question 9

What’s the unit for acceleration ?

Answer 9

m/s2

Question 10

If the value calculated for acceleration is negative what does that mean?

Answer 10

The body is decelerating - same as negative acceleration

Question 11

If the line on a velocity time graph is horizontal the acceleration is?

Answer 11

Zero

Question 12

What does the area under the line on a velocity time graph represent?

Answer 12

The distance travelled in the given time

Question 13

On a VT graph is the object is decelerating what will the line look like?

Answer 13

Negative

Question 14

How do you calculate the acceleration of an object on a VT graph?

Answer 14

Work out the gradient of the line

Question 15

How do you calculate the speed of an object on a DT graph?

Answer 15

Work out gradient

Question 16

What does an upwardly curving line represent on a
DT graph
VT graph
?

Answer 16

Increasing velocity

Increasing acceleration

Question 17

How can an object travelling at a steady speed be accelerating?

Answer 17

By changing it’s direction

Question 18

A car accelerates from rest to a speed of 40m/s in 10s. What’s its acceleration?

Answer 18

4m/s2

Question 19

What does the gradient on a DT graph represent?

Answer 19

An objects speed