Net Force and Newton's 2nd Law Practice

Cart A and cart B both experience the same net force.  Cart A has a mass of 4 kg, while cart B has a mass of 2 kg.  Which statement about the carts’ accelerations is correct?

• Cart A’s acceleration is one-fourth as much as cart B’s acceleration.

• Cart A’s acceleration is one-half as much as cart B’s acceleration.

• Cart A’s acceleration is the same as cart B’s acceleration.

• Cart A’s acceleration is twice as much as cart B’s acceleration.

• Cart A’s acceleration is four times as much as cart B’s acceleration.

A block slides across a rough, horizontal surface.  Consider only the up-and-down direction.  What is the direction of this block’s vertical acceleration?

• Up

• Down

• The vertical acceleration is zero

• The vertical acceleration cannot be determined.

If an object experiences no net force, which of the following must be true about its motion? 

• The object has an average speed of zero.

• The object's velocity does not change.

• The object cannot move.

• No horizontal forces can act on the object.

A drag racing car speeds up from rest to 22 m/s in 2 s.  The car has mass 800 kg; the driver has mass 80 kg. Calculate the acceleration of the car. Include correct units for acceleration (m/s/s) with no spaces in your answer.

A drag racing car speeds up from rest to 22 m/s in 2 s.  The car has mass 800 kg; the driver has mass 80 kg. Calculate the net force on the car. Include the correct units (N) and use no spaces in your answer.

A drag racing car speeds up from rest to 22 m/s in 2 s.  The car has mass 800 kg; the driver has mass 80 kg. Which experiences the greater net force, the car or the driver?

• The car

• The driver

• They experience the same net force

A 2 kg block experiences four forces, as shown. What is the direction of the horizontal net force? If the net force is zero, write "none"

A 2 kg block experiences four forces, as shown. What is the direction of the vertical net force? If the net force is zero, write "none"

A 2 kg block experiences four forces, as shown. What is the magnitude of the block's horizontal acceleration? Include correct units (m/s/s) and no spaces.

A 2 kg block experiences four forces, as shown. What is the magnitude of the block's vertical acceleration? Include correct units (m/s/s) and no spaces.