Tennessee Science Grade 7

Section 3: The Laws of Motion

Self-Check Quiz - English

1
Newton's second law of motion states that __________.
A)an object will remain at rest or keep moving at constant speed unless a force acts on it
B)acceleration is calculated by dividing the force exerted on an object by the mass of the object
C)when a force acts on an object, its acceleration is in the same direction as the force
D)when a force is applied on an object, there is an equal force applied by the object in the opposite direction
2
__________ is a force that resists motion between two surfaces that are in contact.
A)Friction
B)Resistance
C)Inertia
D)Acceleration
3
In describing the acceleration given to a 2-kg object by a 10-N force acting on it, which of these units is appropriate?
A)N
B)m/s2
C)N/kg2
D)kg/s2
4
What causes a falling skydiver to slow down after his parachute opens?
A)gravity
B)air resistance
C)inertia
D)reference motion
5
acceleration is 0.5 m/s2. What is the force being applied?
A)72 N
B)35.5 N
C)1.8 N
D)18 N
6
If a force applied to an object with mass of 1 kg causes the object to accelerate 1 m/s per second, what is the force that is applied?
A)10 N
B)100 N
C)1,000 N
D)1 N
7
A 75-kg person pushes a 12-kg person in a swing with a force of 3 N. What is the acceleration of the person doing the pushing?
A)0.04 m/s2
B)0.25 m/s2
C)25 m/s2
D)0.4 m/s2
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