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Newton's Laws Of Motion
Test Description: Laws of Motion
Instructions: Answer all questions to get your test result.
1) Which quantity is a vector
A
power
B
speed
C
kinetic energy
D
weight
2) A 65.0 kg astronaut weighs 638 newtons at the surface of Earth. What is the mass of the astronaut at the surface of the Moon where acceleration of gravity is 1.62 m per s2?
A
638N
B
65.0 kg
C
105N
D
10.7 kg
3) When the sum of all the forces acting on a block on an inclined plane is zero, the block
A
must be accelerating
B
must be at rest
C
may be slowing down
D
may be moving at constant speed
4) The greatest increase in the inertia of an object would be produced by increasing the
A
mass of the object from 1.0 kg to 2.0 kg
B
speed of the object from 1.0m/s to 2.0 m/s
C
time that a net force is applied to the object from 1.0s to 2.0s
D
net force applied to the object from 1.0N to 2.0N
5) A 100 kg cart accelerates at 0.50 m per s squared west as a horse exerts a force of 60 N west on the cart. What is the magnitude of the force that the cart exerts on the horse?
A
50 N
B
110 N
C
10 N
D
60 N
6) The magnitude of an unbalanced force applied to a 4.0 kg crate is 10. N. If the magnitude of this applied unbalanced force is doubled, the inertia of the crate is
A
unchanged
B
doubled
C
quadrupled
D
halved
7) Which terms identify two scalar quantities?
A
energy and time
B
mass and velocity
C
impulse and distance
D
force and acceleration
8) A student throws a 5.0 N ball straight up. What is the net force on the ball at its maximum height?
A
5.0 N up
B
9.8 N down
C
5.0 N down
D
0.0 N
9) A 1.5 kg cart initially moves at 2.0 meters per second. It is brought to rest by a constant net force in 0.30 second. What is the magnitude of the net force?
A
0.90 N
B
10. N
C
0.40 N
D
15 N
10) Which object has the greatest inertia?
A
a 30. kg child traveling at 10. m/s on her bike
B
a 490 kg elephant walking with a speed of 1.0 m/s
C
a 0.010 kg bullet traveling 90. m/s
D
a 1500 kg car at rest in a parking lot
*select an answer for all questions
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