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WorksheetsScience Physics Express 2: Kinematics_Free Fall
Total questions: 32
Worksheet time: 24mins
In the absence of air resistance, objects fall at constant
a. speed.
b. velocity.
c. acceleration.
d. distances each successive second.
e. all of the above
A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be
a. less than the speed it had when thrown upwards.
b. more than the speed it had when thrown upwards.
c. the same as the speed it had when thrown upwards.
Suppose an object is in free fall. Each second the object falls
a. the same distance as in the second before.
b. a larger distance than in the second before.
c. with the same instantaneous speed.
d. with the same average speed.
e. none of the above
A ball is thrown straight up. At the top of its path its acceleration is
a. 0 m/s2.
b. 9.8 m/s2.
c. -9.8 m/s2.
d. 4.9 m/s2.
e. -4.9 m/s2.
Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)
a. A cat stands on a tree limb.
b. A cat jumps from the ground onto a tree limb.
c. A cat jumps from a lower tree limb to a higher one.
d. A cat jumps from a tree limb to the ground.
Suppose you are given a position versus time graph. The slope of this graph describes what quantity?
a. acceleration
b. displacement
c. velocity
d. position
Which of the following line segments on a position versus time graph is physically impossible?
a. a horizontal line
b. a straight line that slopes to the left
c. a straight line that slopes to the right
d. a vertical line
If you know the acceleration of a car, its initial velocity, and the time interval, which of the following can you predict?
a. the direction of the car’s final velocity
b. the magnitude of the car’s final velocity
c. the displacement of the car
d. all of the above
When a car’s velocity is positive and its acceleration is negative, what is happening to the car’s motion?
a. The car slows down.
b. The car speeds up.
c. The car travels at constant speed.
d. The car remains at rest.
Acceleration due to gravity is also called
a. negative velocity.
b. displacement.
c. free-fall acceleration.
d. instantaneous acceleration.
Zander is walking in the quad minding his own business when all of a sudden he feels something hit his head. Chase starts to laugh and tells Zander that a bird just pooped on him. Chase noticed that the poop fell for 3 seconds. How high above the ground was the bird when he made the decision to bomb Zander.
a. 88.2 m
b. 44.1 m
c. 14.7 m
d. 29.4 m
Suppose you take a trip that covers 180 km and takes 3 hours to make. Your average speed is
30 km/hr
60 km/hr
180 km/hr
360 km/hr
A freely falling object starts from rest. After falling for 6 seconds, it will have a velocity of about
- 6 m/s
- 30 m/s
- 60 m/s
- 300 m/s
What is the acceleration of gravity?
9.8 m/s2
9.8 m/s
4.9 m/s
4.9 m/s2
If a Samsung Galaxy S9 (mass: 0.168 kg) and an iPhone X (mass: 0.846 kg) are dropped from a 50 m tower, which will hit the ground first? Assume no air resistance.
Galaxy S9
iPhone XS
Tie
If an object is in free fall and there is no air resistance, is there any acceleration in the x-direction?
yes
no
2 answers.
When an object is only under the influence of gravity, the object is...
in free fall
traveling at constant acceleration
traveling at constant velocity
is increasing
Select all that apply.
If an object is thrown upwards in the air, the ball will...
travel at a constant acceleration
slow down initially
have a velocity of 0 m/s at its maximum height
travel at a constant velocity
