3E Practice Problems

What force does a soccer ball apply to a person's foot if the ball experiences a 1000 N force?

Mathematical Equivalence

ON

A 20 kg box rests on a table. Identify the three action-reaction force pairs involved in the box sitting on the table. Check all that apply.

• Earth/Box

• Earth/Table

• Box/Table

• Earth/Earth

A 20 kg box rests on the table. What force does the earth exert on the box?

Mathematical Equivalence

ON

A 20 kg box rests on a table. What force does the box exert on the earth?

Mathematical Equivalence

ON

A 20 kg box rests on a table. What force does the table exert on the box?

Mathematical Equivalence

ON

A 20 kg box rests on a table. What force does the box exert on the table?

Mathematical Equivalence

ON

A spring is compressed between two blocks, one with a mass of 2 kg and the other with a mass of 3 kg. If the 2 kg block has an average acceleration of 6 m/s² when the spring acts on it, what will be the average acceleration of the 3 kg block?

Mathematical Equivalence

OFF

A 30 kg girl and a 40 kg boy stand on rollerskates, face one another, and push off each other. If the boy accelerates backward with an acceleration of 6 m/s², what will be the acceleration of the girl?

Mathematical Equivalence

ON

A 1000 kg car collides with a 1 mg mosquito. By what factor will the acceleration of the mosquito be greater than the acceleration of the car when they collide?

Mathematical Equivalence

ON

What is the force on a person's hand, which is using a rope to accelerate a 5 kg block upward with an acceleration of 2.2 m/s²?

Mathematical Equivalence

ON