Regents Review- Newton's Laws

If a block is in equilibrium, the magnitude of the block's acceleration is

• zero

• decreasing

• increasing

• constant, but not zero

The magnitude of an unbalanced force applied to a 4.0-kilogram crate is 10. newtons. If the magnitude of this applied unbalanced force is doubled, the inertia of the crate is

• halved

• unchanged

• doubled

• quadrupled

As a result of these forces, the block

• moves at a constant speed to the right

• moves at constant speed to the left

• accelerate to the right

• accelerate to the left

A 4.0-kilogram object is accelerated at 3.0 meters per second² north by an unbalanced force. The same unbalanced force acting on a 2.0-kilogram object will accelerate this object toward the north at

• 12 m/s²

• 6.0 m/s²

• 3.0 m/s²

• 1.5 m/s²

A 40.0-kilogram child exerts a 100.-newton force on a 50.0-kilogram object. The magnitude of the force that the object exerts on the child is

• 0.0 N

• 80.0 N

• 100 N

• 125 N

The string is cut and the carts move apart. Compared to the magnitude of the force the spring exerts on cart A, the magnitude of the force the spring exerts on cart B is

• the same

• half as great

• twice as great

• four times as great

A 160.-kilogram space vehicle is traveling along a straight line at a constant speed of 800. meters per second. The magnitude of the net force on the space vehicle is

• 0 N

• 1.60 x 10² N

• 8.00 x 10² N

• 1.28 x 10⁵ N

Which object has the greatest inertia

• A

• B

• C

• D

A rock is thrown straight up into the air. At the highest point of the rock's path, the magnitude of the net force acting on the rock is

• less than the magnitude of the rock's weight, but greater than zero

• greater than the magnitude of the rock's weight

• the same as the magnitude of the rock's weight

• zero

When the sum of all the forces acting on a block on an inclined plane is zero, the block

• must be at rest

• must be accelerating

• may be slowing down

• may be moving at a constant speed