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WorksheetsUnit 7 Review
Total questions: 25
Worksheet time: 13mins
In the figure, which arrow best shows the direction of the force acting on the washer at this instant in time?
Arrow A
Arrow B
Arrow
Arrow D
In the figure, which arrow best shows the direction of the tangential velocity of the washer at that instant in time.
Arrow A
Arrow B
Arrow
Arrow D
A CD spins at an angular velocity of 10 revolutions per second counterclockwise. Which of the following statements about the CD is true?
A net torque acts on it clockwise to keep it moving.
A net torque acts on it counterclockwise to keep it moving.
No net torque acts on it at all.
The moon's gravity is about 1/6 of Earth Gravity. How does the period of a pendulum on the moon compare to the period of the same pendulum on Earth?
The period on Earth is longer
The period on the moon is longer
The period is the same on the Earth and on the moon
There is not enough information to answer the question.
Gravity on the moon is 1.6 m/s/s. Determine the period of a 2m long pendulum on the moon.
3.5 seconds
7.0 seconds
2.8 seconds
2.0 seconds
An arrow is fired horizontally and a marble is dropped from the same height. Without air resistance, which of the following happens?
The arrow hits the ground first
The marble hits the ground first.
Both hit the ground at the same time.
You can't tell from the information given.
Two identical pendulums are on the surface of Mars and Earth. The period of the Mars pendulum is longer than the one on Earth. Why?
There is more friction from the Martian atmosphere.
The acceleration due to gravity on Mars is greater than that on Earth.
The rotation of Mars affects a pendulum more than Earth.
The acceleration due to gravity on Mars is less than that on Earth.
Which of the following will happen?
The seesaw will rotate counterclockwise.
The seesaw will rotate clockwise.
The seesaw will remain balanced.
You cannot tell from the information provided.
What force causes centripetal acceleration of a car making a turn on a flat road?
gravity
normal force
friction
weight
In the figure, which arrow designates a factor that the period of the pendulum's motion depends on?
Arrow A
Arrow B
Arrow C
Arrow D
In the figure, which arrow designates the amplitude of the pendulum's motion?
Arrow A
Arrow B
Arrow C
Arrow D
In the figure, which arrow designates the angular displacement of the pendulum's motion?
Arrow A
Arrow B
Arrow C
Arrow D
What is the centripetal acceleration of a jet making a turn with a radius of 0.50 km (500 meters!) at a speed of 343 m/s?
686 m/s/s
0.7 m/s/s
235 m/s/s
235000 m/s/s
Which force produces the largest torque?
20 N at a radius of 0.5 m
20 N at a radius of 1.0 m
10 N at a radius of 0.25 m
10 N at a radius of 1.5 m
A tennis ball is hit across the court, raising up and coming back down. Which of the following statements is true about the tennis ball at the top of its path?
The horizontal velocity is zero
The horizontal acceleration is zero.
The vertical acceleration is zero.
All other statements are false.
What is the name for the path a projectile takes?
hyperbolic path
trajectory
centripetal
linear path
The centripetal force always points
outside the circle
to the center of the circle
in the direction of the motion
tangential to the circle
A plumber needs to increase the torque to unfasten a pipe. How can they do this?
ONLY by applying more force
Only by getting a longer wrench.
Applying more force AND getting a longer wrench.
Neither more force NOR a longer wrench will help.
A T-shirt cannon needs to launch shirts as far as possible. What angle should the cannon be fired at?
parallel to the ground
30 degrees over the ground
45 degrees over the ground
60 degrees over the ground
Which forces are acting on a projectile as it flies through the air?
gravity and normal
gravity and applie
gra
just gravity
Which ball travels farther to the right?
Ball A will go farther
Ball B will go farther.
They will hit the ground in the same place.
Which ball will hit the ground first?
Ball A lands first
Ball B lands first.
They will hit the ground at the same time.
If the centripetal force suddenly stops, an object traveling in a circle will
continue traveling along the tangent line to the circular path.
continue traveling along the circular path.
stop moving.
continue traveling in some random direction.
Which statement about a HORIZONTAL projectile is false?
The horizontal velocity is constant.
The horizontal acceleration is constant.
The vertical velocity is constant.
The vertical acceleration is constant.
If a ball falls from cliff and lands in one second, how far did it fall?
1
5 meters
20 meters
25 meters
