# Unit 4 Test 2: Question Preview (ID: 28185)

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Pick the best example of newtons third law in action
a) A rocket taking off from earth
b) A rocket sitting on the ground
c) A rocket that is accelerating through space
d) Both B and C

According to Newtons third law of motion, when a hammer strikes and exerts a force on a nail, the nail
a) creates a balanced force
b) disapears into the wood
c) moves at a constant speed
d) exerts an equal and opposite force back on the hammer

A book is sitting on a dashboard of a car that is stopped at a traffic light. As the car starts to move forward, the book slides off the dashboard. Pick the most correct explanation.
a) There was grease on the dashboard
c) a supernatural force took over.
d) Air resistance made the book move backward.

The force of gravity of a person or object at the surface of a planet is known as?
a) mass
b) air resistance
c) inertia
d) weight

The amount of matter in an object is called its____.
a) mass
b) balance
c) force
d) weight

The greater the mass of an object,
a) the less force it can excert.
b) the more space it takes up.
c) the more balanced it is.
d) the greater the inertia.

The tendancy of an object to resist any change of motionis known as _____.
a) force
b) mass
c) inertia
d) balance

How does Newtons third law explain how a rocket takes off?
a) The rockets acceleration is positive, while the gasses acceleration is negative but the direction is the same.
b) The rocket is at rest until ignition
c) The hot gasses move in one direction, while the rocket moves in the opposite direction but with equal force.
d) The hot gasses cause global warming.

Divide the total distance traveled by the total time is how to calcualte
a) average speed
b) average velocity
c) average acceleration
d) average motion

Pick the best example of Newtons second law in action
a) A rocket taking off from earth
b) A rocket sitting on the ground
c) A rocket that is accelerating through space
d) Both B and C

Pick the best example of Newtons First Law in action
a) A rocket taking off from earth
b) A rocket sitting on the ground
c) A rocket acceleration through space
d) Both B and C

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