Forces/Friction Review Block 2

As the mass of an object on Earth's surface decreases, what happens to the inertia and weight of the object?

• Inertia decreases, and weight decreases.

• Inertia decreases, and weight remains the same.

• Inertia increases, and weight decreases.

• Inertia remains the same, and weight remains the same.

Compared to the inertia of a 0.10-kilogram steel ball, the inertia of a 0.20-kilogram Styrofoam ball is

• the same

• one-half as great

• twice as great

• four times as great

A cart is uniformly accelerating from rest. The net force acting on the cart is

• decreasing

• zero

• constant but not zero

• increasing

An 8.0-kilogram block and a 2.0-kilogram block rest on a horizontal frictionless surface. When horizontal force F is applied to the 8.0-kilogram block, it accelerates at 5.0 meters per second² east. If the same force was applied to the 2.0-kilogram block, the magnitude of the block's acceleration would be

• 10. m/s²

• 20. m/s²

• 1.3 m/s²

• 2.5 m/s²

A 6-newton force and an 8-newton force act concurrently on a box located on a frictionless horizontal surface. Which top-view diagram shows the forces producing the smallest magnitude of acceleration of the box?

• 
• 
• 
• 

As the vector sum of all the forces acting on a moving object increases, the magnitude of the acceleration of the object

• Increases

• Decreases

• Remains the Same

An unbalanced force of 10.0 newtons north acts on a 20.0-kilogram mass for 5.0 seconds. Calculate the acceleration of the mass.

Two horizontal forces are applied to a 2.0-kilogram block on a frictionless, horizontal surface, as shown in the following diagram. The acceleration of the block is

• 5.0 m/s² to the right

• 5.0 m/s² to the left

• 3.0 m/s² to the right

• 3.0 m/s² to the left

Which graph best represents the motion of an object on which the net force is zero?

• 
• 
• 
• 

The vector diagram below represents force F acting on point P. Which vector diagram represents the pair of concurrent-forces that would produce equilibrium when added to force F?

• 
• 
• 
•