7.5 Motion graphs

Question 1

What is displacement

Answer 1

Distance in a given direction from a certain point

Question 2

What does the gradient of a displacement time graph represent

Answer 2

The velocity of the object

Question 3

Displacement time graph of a ball

Answer 3

Use s=ut^2-1/2gt^2
n curve
Immediately ater leaving the throwers hand, the velocity is positive and large so the gradient is positive and large
As the ball rises, its velocity decreases so the gradient is zero
As the ball descends, its velocity becomes increasingly negative, corresponding to increasing speed in a downward direction so the gradient becomes increasingly negative

Question 4

What does the gradient of a distance time graph represent

Answer 4

The speed of the object

Question 5

How does the distance time graph of an object projected upwards differ from the displacement time graph

Answer 5

curves and curves again rather than one n curve

This is because after maximum height, it continues to increase in distance travelled so it curves upwards

Question 6

What is velocity

Answer 6

Speed in a given direction

Question 7

What does the gradient of a velocity time graph represent

Answer 7

The objects acceleration

Question 8

What does the area under a velocity time graph represent

Answer 8

The displacement of the object from its starting position

Question 9

Value for g

Answer 9

9.8ms^-2