Last Test

The box shown is accelerating at a rate of 2 m/s2. The net force on the box is 8 N. What is the box's mass?

• 2 kg
• 4 kg
• 6 kg
• 10 kg

​A 2-kg plant resting on a table applies a force of approximately 20 N downward on the table.

 

Approximately how much force does the table apply to the plant?

• 0 N
• 2 N
• 20 N
• 10 N

Which situation most clearly presents an example of Newton's third law of motion?

• A rock continues to pick up speed as it falls from a cliff high above the ground.

• A 20-kilogram box requires more force to move than a 10-kilogram box.

• A baseball breaks a bat by exerting an equal and opposite force when they collide.

• A book resting on a table remains in the same position until it is moved by some external force.

The picture shows a free body diagram of a ball as it rolls across the ground.

What is the net force on the ball?

The brick shown below is accelerating at a rate of 12 m/s².  The brick's mass is 3 kg.

What is the net force on the brick?

• 36 N
• 48 N
• 24 N
• 4 N

The ball shown below is accelerating at a rate of 10 m/s².  The ball's mass is 5 kg.

What is the net force on the ball?

• 5 N
• 100 N
• 20 N
• 50 N

The picture shows two concrete bricks in a state of rest.

Which of the following is a true statement regarding the bricks?

• Brick 1 is experiencing more friction than Brick 2.

• Brick 2 is experiencing more pressure than Brick 1.

• More force is required to move Brick 1.

• More force is required to move Brick 2.

Two cars the same size and shape, but weighing different amounts, were both pushed over the edge of ramps of the same length and angle. Car A weighs 1 ton; car B weighs 2 tons. 

According to Newton's second law of motion, which is true?

• Car A will accelerate faster because its lesser mass will be less affected by friction than car B.

• Car B will accelerate faster because its greater mass will counteract friction more than car A.

• Both cars will share the same acceleration despite the difference in their masses.

• Not enough information is provided to determine which car will accelerate faster.

Assume that the cart strikes the wall with a force of 5 Newtons.
Which best identifies the force the wall exerts on the cart?

• 0 Newtons

• between 0 and 5 Newtons

• 5 Newtons

• more than 5 Newtons

Which law helps determine the correct answer to the question below

"Assume that the cart strikes the wall with a force of 5 Newtons. Which best identifies the force the wall exerts on the cart?"

• Newton's first law

• 
  Newton's second law

• Newton's third law