General Physics 1 Summative Test

Which causes acceleration

• Inertia

• Nonzero net force

• Speed

• Velocity

Which force arises from direct physical contact between two objects?

• field force

• friction

• fundamental force

• gravitational force

A 2000 kg car is accelerated uniformly from rest to a speed of 15 m/s in 10 s. What is the magnitude of the unbalanced force acting on the car?

• 3x102 N

• 3x103 N

• 3x104 N

• 3x105 N

Which is always TRUE for a body in equilibrium?

• It is at rest.

• There are no forces acting on it.

• It is moving at constant velocity.

• There is no unbalanced force acting on it.

A hammer drives a nail into a piece of wood. Which describes an action-reaction pair?

• The hammer exerts a force on the nail; the wood exerts a force on the nail.

• The hammer exerts a force on the nail; the nail exerts a force on the hammer.

• The hammer exerts a force on the nail; the hammer exerts a force on the wood.

• The nail exerts a force on the hammer; the hammer exerts a force on the wood.

A man stands on a weighing scale while inside the elevator that is moving upward at a constant speed. What will be the reading of the scale?

• zero

• his weight

• less than his weight

• greater than his weight

Which law tells us that the air resistance encountered by a falling object is proportional to its velocity?

• law of acceleration

• law of interaction

• Newton's law of resistances

• Stoke's law

Which of the following does NOT affect the force of sliding friction?

• area and sliding speed

• nature of surface contact

• material of objects in contact

• normal force pressing the surface together

When you go upstairs, you _______________.

• do not do the work at all.

• do less work when you walk than when you run.

• do more work when you walk than when you run.

• do equal amount of work whether you run or walk

A force F is applied to a spring, causing it to stretch by a distance x. If the applied force is reduced to one-half its value, how long will the spring be stretched?

• quartered

• halved

• doubled

• quadrupled