The rate of change in the speed of an object is known as:
acceleration
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The metric unit of force preferred by scientists is the:
Newton
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The metric unit of mass, distance and time preferred by scientists are the:
kilogram, meter, second
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The inertia of two objects must be the same if the same force causes the same ____?
acceleration
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Two forces are applied to a 2.0-kilogram block on a frictionless, horizontal surface, as shown in the following diagram. What is the acceleration (speed and direction).
3 m/s/s right
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The acceleration due to gravity is:
9.8 m/s/s
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Terminal speed occurs when:
force of gravity (weight) = air resistance up
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A skydiver reaches an instantaneous velocity of 88.2 meters per second before opening his parachute. How long was he in free fall?
9 seconds
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The graph below represents the motion of a moving vehicle. What is the speed of the vehicle during the time interval from t = 2.0 seconds to t = 4.0 seconds?
10 m/s
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According to Figure 2-1A, what is the speed of the 2.0-kilogram mass when the time equals 5 seconds?
3 m/s
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A rocket can fly into space because what pushes on the rocket?
The exhaust gases
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Energy that is stored due to the position of an object may be called ____ energy.
Potential
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An object falls without friction near Earth’s surface. The loss of its potential energy is equal to its gain in ___________ energy
Kinetic
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Work may be measured using units of:
Joules
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Lifting a 70-kilogram barbell 2.0 meters above the floor increases its potential energy by about:
1400 Joules
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Shawna, who weighs 54 kilograms, is roller blading on a level surface. If she is rolling at 12 meters per second, to what height would she roll up an incline before stopping? (Assume there is no friction.)