Physics Forces Quiz 1

A rocket in space can travel without engine power at constant speed in the same direction. This condition is best explained by the concept of:

• frames of reference.

• gravity.

• acceleration.

• inertia.

If the mass of a moving object is doubled, its inertia would be:

• halved.

• the same.

• doubled.

• four times greater.

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NGSS.HS-PS2-1

A coin is resting on a piece of cardboard on a beaker as shown in the diagram. When the cardboard is rapidly removed, the coin falls into the beaker. The two properties of the coin that best explain its fall are its weight and its:

• inertia.

• volume.

• temperature.

• shape.

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NGSS.MS-PS2-2

NGSS.MS-PS2-4

If there is no net force acting on a moving object, the object will:

• change its direction of motion.

• accelerate.

• continue with constant speed in a straight line.

• slow down and stop.

Which person has the greatest inertia?

• A 90-kg man walking at 2 m/s

• A 110-kg wrestler resting on a mat

• A 50-kg girl sprinting at 9 m/s

• A 70-kg long-distance runner traveling at 5 m/s

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NGSS.MS-PS2-2

A box is sliding along a frictionless, horizontal surface. Which of the following describes the motion of the box as it continues to slide along the surface?

• The box will slow down as it uses up its speed.

• The box will continue to slide with constant speed only if it is rolling downhill.

• The box will slow down as it runs out of the force of motion.

• The box will continue to slide with constant speed.

Which object has the most inertia?

• a 10-kg tricycle at rest

• a 5-kg bowling ball traveling at 3 m/s

• a 0.001-kg bumblebee traveling at 2 m/s

• a 0.1-kg baseball traveling at 20 m/s

Tags

NGSS.MS-PS2-2

John observed his little sister pushing on a block. Because he was studying forces at school, John wondered about the motion of the block in the situation in which all of the forces on the block were balanced. Choose the answer the best describes what the block will be doing.

• The block would have to be slowing down.

• The block would have to be at rest.

• The block could be going at any constant speed, including being at rest.

• The block would have to be moving at a constant speed.

Jim puts a block on a very slippery table and gives it a shove. After he lets go, the block slides across the table with an almost constant speed.

Which statement best describes the horizontal forces on the block as it slides across the table to the right?

• A constant force of motion keeps the block moving to the right.

• The force to the right is greater than the frictional force to the left.

• The force to the right is zero; the frictional force to the left is very small.

• A force of motion to the right is proportional to the speed.

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NGSS.MS-PS2-2

John tried to move a table sideways, but could not make it move even though he pushed on it sideways. Why didn't the table move?

• John's push is not large enough to overcome the inertia of the table.

• If the table is not moving, the force by John must be zero.

• The frictional force on the table is larger than John's push on the table.

• The frictional force on the table is equal to John's push on the table.

• John's push is not large enough to overcome the gravitational force on the table.

Tags

NGSS.MS-PS2-2