22 Questions
| Attempts: 1364

Questions and Answers

- 1.Suppose a car is moving in a straight line and steadily increases its speed. It moves from 20 m/s to 30 m/s in the first second and from 30 m/s to 40 m/s in the second second. What is the car's acceleration?
- A.
10 m/s/s

- B.
30 m/s/s

- C.
35 m/s/s

- D.
40 m/s/s

- 2.An object travels 12 metres in the first second of travel, 12 metres again during the second second of travel and 12 metres again during the third second. Its acceleration is
- A.
0 m/s/s

- B.
12 m/s/s/

- C.
4 m/s/s

- D.
None of the above

- 3.If an object has a negative velocity, that means it is
- A.
Slowing down

- B.
Going back towards

- C.
Speeding up while going forward

- D.
All of these

- 4.A car accelerates at 3 m/s/s, assuming it starts from rest, how much time does it take to accelerate to speed of 45 m/s?
- A.
135 seconds

- B.
90 seconds

- C.
15 seconds

- D.
None of the above

- 5.A man travels from his home 50m east to the bakery then 20 m south to the butchers, he retraces his steps back to the bakery and stops fora coffee.What is the distance he has traveled and what is his displacement?
- A.
90m, 70, south

- B.
90m east, 0

- C.
70m, 20m north

- D.
90m, 50m east

- 6.Which of the below shows only vector quantities?
- A.
Distance and displacement

- B.
Displacement, velocity and acceleration

- C.
Speed and velocity

- D.
Speed, velocity and acceleration

- 7.The school bus speeds up from 20 m/s to 36 m/s in 4 seconds. What distance does the bus cover in this time frame?
- A.
80 m

- B.
112 m

- C.
64 m

- D.
144 m

- 8.A brick and a feather are dropped at the same time, from rest in a vacuum (a place where there is no air). The feather will reach the ground
- A.
Sooner than the brick

- B.
At the same time as the brick

- C.
Later then the brick

- D.
It depends on air resistance

- 9.The slope of a velocity-time graph tells you
- A.
Maximum velocity

- B.
Acceleration

- C.
Distance traveled

- D.
Where you are

- 10.The area under a velocity - time graph represents the
- A.
Acceleration

- B.
Distance traveled

- C.
Velocity

- D.
Time

- 11.What does the position - time graph show from 0 - 15 seconds?
- A.
A person accelerates from rest to 60 m/s in 10 seconds and then travels at a constant velocity for 5 seconds.

- B.
A person climbs up a hill to 60 metres then sits on top of the hill for 5 seconds.

- C.
A person walks with a constant velocity for 60 metres in a positive direction in 10 seconds then remains still for 5 seonds.

- 12.After 15 seconds select from below which one best describes this position-time graph
- A.
The person turns around and takes 25 seconds to walk 40 m past their original postion before turning around again and taking 15 seconds to return back to where they first started

- B.
The person starts to slow down until they reach -40 m/s then start to speed up again.

- C.
The person climbs down the other side of the hill, it takes them 25 seconds and then they start to climb the next hill

- 13.Which graph shows an object at rest?
- A.
Graph A

- B.
Graph B

- C.
Graph C

- D.
Graph d

- 14.Which graph shows constant velocity in a positive direction?
- A.
Graph A

- B.
Graph B

- C.
Graph C

- D.
Graph D

- 15.The symbol used to represent the acceleration due to gravity is
- 16.Assuming there is no air resistance, as an object falls freely, its
- A.
Velocity increases

- B.
Acceleration increases

- C.
Both A & B

- D.
None of the above

- 17.A rock is thrown over a cliff, each second the rock falls
- A.
A larger distance than the second before it

- B.
With the same average speed

- C.
With the same instantaneous speed

- D.
The same distance as the second before

- 18.Ten seconds after starting from rest, a free falling object will have a velocity of about
- A.
10 m/s

- B.
50 m/s

- C.
100 m/s

- D.
500 m/s

- 19.Convert 80 km/h into m/s
- A.
0.22 m/s

- B.
22.22 m/s

- C.
222.22 m/s

- D.
0.0022 m/s

- 20.An abseiler needs to find how high a cliff is. He drops a small rock over the side, it takes 6 seconds before it hits the ground. Using 9.8 m/s/s for gravity, how high is the cliff?

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