Forces and motion Chapter 3

Question 1

What is the definition of instantaneous speed?

Answer 1

Speed of object over a very sort time

Question 2

In velocity time graph what does area represnt?

Answer 2

displacement

Question 3

What is braking distance?

Answer 3

Distance travelled when brakes first applied until when vehicle stops

Question 4

What is thinking distance?

Answer 4

Distance travelled between moment you see reason to stop to moment you brake

Question 5

What is stopping distance?

Answer 5

Braking + thinking distances

Question 6

For projectile motion what are the two phrases?

Answer 6

Constant horizontal velocity
Constant vertical acceleration

Question 7

Draw the table when doing SUVAT for projectile motion.

Answer 7

Horizontal Vertical
S ? ?
U ? 0
V ? ?
A 0 -9.81
T ? ?

Question 8

What is terminal verlocity?

Answer 8

Constant speed reached by an object when drag fore is equal to weight force