Laws of Motion

Inertia is a measure of an object's__________________.

• force

• velocity

• mass

• weight

The mass of a physics book that weighs 10 N is about______.

• 10 kg

• 5 kg

• 3 kg

• 1 kg

A book is resting on a table. Consider the action force to be the normal force exerted by the table on the book. The reaction to this force is the

• normal force of the book on the table

• friction between the book and the table

• weight of the book

• weight of the table

In the law of interaction, all are true about pair of forces except one. Which is it?

• They occur at the same time.

• They have the same magnitude.

• They act in opposite direction.

• They act on the same body.

Among the following vehicles with the same speed, which has the greatest inertia?

• car

• bus

• train

• none of the given choices

An empty truck whose mass is 2000 kg has a maximum acceleration of 1 m/s². How much is the maximum force force available?

• 2000 kg/m/s

• 2000 m/s²

• 2000 kg.m/s²

• 2000 kg/m.s²

If two girls will be pushed using the same amount of force, who will accelerate more?

• The thin girl

• The fat girl

• Both have equal acceleration

• Only the thin girl will have acceleration.

A book is at rest on top of a table. Which of the following is correct?

• There is no force acting on the book.

• The book has no inertia.

• There is no force acting on the table

• The book is in equilibrium.

When a certain net force is applied to one brick on a frictionless surface, it accelerates at 6 m/s². When the same amount of force is applied to three bricks that are cemented together, _______________.

• they accelerates at 2 m/s².

• they accelerates at 3 m/s².

• they accelerates at 6 m/s².

• they accelerates at 18 m/s².

The frictional force on a bicycle is 50 N. How much forward force does the cyclist need to exert on the bike to maintain constant velocity?

• zero

• 50 N

• More than 50 N

• There is not enough information.