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MOTION/FORCES
Test Description: A review of Newton's laws of motion and simple machines.
Instructions: Answer all questions to get your test result.
1) The velocity of an object is the _____________of the object.
A
acceleration
B
speed and direction
C
speed
D
momentum and weight
2) If a car is traveling at 15 mph and increases to a speed of 45 mph in 10 seconds, what is the acceleration?
A
3mph/s
B
3mph
C
30mph/s
D
30mph
3) The tendency of an object to stay at rest and the tendency of an object in straight-line motion to continue moving is ________
A
friction
B
motion
C
momentum
D
inertia
4) Why do passengers in a car move forward when the car comes to a sudden stop?
A
friction
B
centripetal force
C
gravity
D
inertia
5) The change of motion of an object depends on
A
only the weight of the object and the size of the object
B
only the mass of the object
C
only the size of the force on the object
D
both the mass of the object and the size of the force
6) Why is the force going into a simple machine always greater than the force going out?
A
friction
B
mechanical advantage
C
work
D
inertia
7) Which of the following is the force that resists sliding motion between two surfaces in contact?
A
friction
B
gravity
C
acceleration
D
inertia
8) Children are playing tug-of-war, a contest in which each team tugs on a rope to pull the other team across a line. Everyone is tugging on the rope. Why is no one moving?
A
The net force of the two teams is zero.
B
The children do not have enough mass to create force.
C
There is too much friction for the rope to move.
D
The rope resists any change in motion
9) What happens when a ball rolls uphill?
A
Its acceleration is zero.
B
Its speed increases.
C
Its motion and acceleration are in opposite directions.
D
Its motion and acceleration are in the same direction.
10) What decreases friction?
A
more surface area
B
rough surfaces
C
more speed
D
smooth surfaces
*select an answer for all questions
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