Practice Questions
|
|
| 1. |
An
athlete runs four laps of a 400 m track. What is the athlete’s total
displacement? |
| (A) |
–1600 m |
| (B) |
–400 m |
| (C) |
0 m |
| (D) |
400 m |
| (E) |
1600 m |
|
|
|
| 2. |
Which
of the following statements contains a reference to displacement? |
|
I. “The town is a five mile drive along the winding country
road.”
II. “The town sits at an altitude of 940 m.”
III. “The town is ten miles north, as the crow flies.”
|
| (A) |
I only |
| (B) |
III only |
| (C) |
I and III only |
| (D) |
II and III only |
| (E) |
I, II, and III |
|
Questions 3 and 4 refer to a car that
travels from point A to point B in
four hours, and then from point B back
to point A in six hours. The road between point A and
point B is perfectly straight, and the distance between
the two points is 240 km.
|
|
| 3. |
What is
the car’s average velocity? |
| (A) |
0 km/h |
| (B) |
48 km/h |
| (C) |
50 km/h |
| (D) |
60 km/h |
| (E) |
100 km/h |
|
|
| 4. |
What is
the car’s average speed? |
| (A) |
0 km/h |
| (B) |
48 km/h |
| (C) |
50 km/h |
| (D) |
60 km/h |
| (E) |
100 km/h |
|
|
|
| 5. |
A
ball is dropped from the top of a building. Taking air resistance
into account, which best describes the speed of the ball while it
is moving downward? |
| (A) |
It will increase until it reaches the speed of light |
| (B) |
It will increase at a steady rate |
| (C) |
It will remain constant |
| (D) |
It will decrease |
| (E) |
Its rate of acceleration will decrease until the ball moves
at a constant speed |
|
|
|
| 6. |
A
car accelerates steadily so that it goes from a velocity of 20 m/s
to a velocity of 40 m/s in 4 seconds. What is its acceleration? |
| (A) |
0.2 m/s2 |
| (B) |
4 m/s2 |
| (C) |
5 m/s2 |
| (D) |
10 m/s2 |
| (E) |
80 m/s2 |
|
Questions 7 and 8 relate to the graph
of velocity vs. time of a moving particle plotted at right.
|
|
| 7. |
What is the acceleration and displacement
of the particle at point A? |
| (A) |
Acceleration decreasing, displacement decreasing |
| (B) |
Acceleration constant, displacement decreasing |
| (C) |
Acceleration increasing, displacement decreasing |
| (D) |
Acceleration decreasing, displacement increasing |
| (E) |
Acceleration increasing, displacement increasing |
|
|
| 8. |
How do the
acceleration and displacement of the particle at point B compare
to the acceleration and displacement of the particle at point A? |
| (A) |
Acceleration is less, displacement is less |
| (B) |
Acceleration is less, displacement is the same |
| (C) |
Acceleration is less, displacement is greater |
| (D) |
Acceleration is greater, displacement is less |
| (E) |
Acceleration is greater, displacement is greater |
|
|
|
| 9. |
A
sprinter starts from rest and accelerates at a steady rate for the
first 50 m of a 100 m race, and then continues at a constant velocity
for the second 50 m of the race. If the sprinter runs the 100 m
in a time of 10 s, what is his instantaneous velocity when he crosses
the finish line? |
| (A) |
5 m/s |
| (B) |
10 m/s |
| (C) |
12 m/s |
| (D) |
15 m/s |
| (E) |
20 m/s |
|
|
|
| 10. |
A
woman runs 40 m to the north in 6.0 s, and then 30 m to the east
in 4.0Â s. What is the magnitude of her average velocity? |
| (A) |
5.0 m/s |
| (B) |
6.0 m/s |
| (C) |
6.7 m/s |
| (D) |
7.0 m/s |
| (E) |
7.5 m/s |
|
|
|
