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ADV 8th Benchmark Review 1-c
Test Description: Review Questions for Fall Benchmark 8h grade
Instructions: Answer all questions to get your test result.
1) The kinetic energy of an object depends on its
A
mass and speed
B
weight and height
C
acceleration and displacement
D
speed and acceleration
2) Which of the following is true according to the Law of Conservation of Energy
A
Energy can be destroyed, for example when we stop a vehicle.
B
Energy is infinite
C
Energy can be created if we apply enough potential
D
Energy cannot be created or destroyed.
3) What factors affect an object's potential energy?
A
acceleration and reference point
B
speed and velocity
C
mass and speed
D
weight and height
4) A 30 kg ball is moving at a speed of 10 m/s. What is the rock's kinetic energy?
A
1500 J
B
4500 J
C
90 J
D
300 J
5) What is the potential energy of a 50 kg pole-vaulter when she is 4 m above the ground?
A
2000 kg/m
B
125 kg/m
C
200 kg/m
D
12.5 kg/m
6) As a pendulum slows down due to friction, energy is conserved because
A
kinetic energy increases.
B
mechanical energy increases.
C
potential energy increases.
D
thermal energy increases.
7) On a graph of speed-versus-time, what would a constant slope represent?
A
An object is accelerating.
B
An object is traveling at constant speed.
C
An object is either standing still or traveling at constant speed.
D
An object is standing still.
8) A sprinter accelerates from 0 m/s to 8.0 m/s in 5.0 seconds. What is the sprinter's average acceleration?
A
40 m/s^2
B
1.6 m/s^2
C
1.8 m/s
D
1.8 m/s^2
9) Why would it be more important to know the velocity of a hurricane instead of the speed of the hurricane?
A
The velocity tells the change in speed of the hurricane.
B
Knowing the velocity will make it easier to graph the hurricane's movement.
C
The velocity tells you how long the hurricane will last.
D
The velocity tells you the speed and direction the hurricane is heading
10) The rate at which an object is moving at a given instant in time is called
A
instantaneous speed.
B
final velocity.
C
initial velocity.
D
average speed.
*select an answer for all questions
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