Test Unit 3- Motion

Question 1

Part 1 Mulitple choice

2. 3m/s north is an example of…

Answer 1

Velocity

Question 2

3. A car moves around a wide turn going 45 mi/hr the whole time. The car has a constant…

Answer 2

Speed

Question 3

4. If you ride your bicycle down a straight road for 500 m then turn around and ride back to your starting point, your distance is ______ your displacement.

Answer 3

Greater than

Question 4

5. An object in motion MUST be under going change of …..

Answer 4

Position

Question 5

23. Ben is exercising his pony on a large, oval track. The pony is trotting at a constant speed of 10m/s around the track. What statement can be made about the pony’s motion?

Answer 5

The pony is acclerating

Question 6

27. Can the velocity of a car change when it’s speed is constant? Explain why or why not.

Answer 6

Yes, the speed of the car will stay constant until a force acts on it.

Question 7

29. Describe the motion of a biker at A,B, and C as shown by the distance vs . Time graph 1

Answer 7

A= the biker is moving at a constant speed

B= the biker has stopped

C= the biker is at a constant speed but is slower than part A

Question 8

33. A person walking covers 5.20 m in 10.4s. How fast is the person moving?

Answer 8

Given: distance- 5.20m , time- 10.4s
Find: speed
Formula: s=d/t
Substitute: s= 5.20/ 10.4s

Solve: 0.5 m/s

Question 9

39. A competitive go-cart driver is travelling 32 m/s. He sees a caution flag go up, so he slows at a rate of -1.5 m/s squared in 10.8 s, what is his final velocity?

Answer 9

Given: vi- 32 m/s, a= -1.5 m/s 2, t- 10.8 s
Solve: 15.8 m/s forwards