Newton's First Law and Forces Quiz

According to Newton’s first law, a body in motion tends to remain in motion at a constant velocity. However, when you slide an object across a surface, the object eventually slows down and stops. Why?

• 1. The object experiences a frictional force exerted by the surface, which opposes its motion.

• 1. The object experiences the gravitational force exerted by Earth, which opposes its motion

• 1. The object experiences an internal force exerted by the body itself, which opposes its motion.

• 1. The object experiences a pseudo-force from the body in motion, which opposes its motion.

Tags

NGSS.MS-PS2-2

What is mass? What does it depend on?

• 1. Mass is the weight of an object, and it depends on the gravitational force acting on the object.

• 1. Mass is the weight of an object, and it depends on the number and types of atoms in the object.

• 1. Mass is the quantity of matter contained in an object, and it depends on the gravitational force acting on the object.

• 1. Mass is the quantity of matter contained in an object, and it depends on the number and types of atoms in the object.

Tags

NGSS.MS-PS1-1

What is inertia?

• 1. Inertia is an object’s tendency to maintain its mass.

• 1. Inertia is an object’s tendency to remain at rest.

• 1. Inertia is an object’s tendency to remain in motion

• 1. Inertia is an object’s tendency to remain at rest or, if moving, to remain in motion.

Which forces can be represented in a free-body diagram?

• 1. Internal forces

• 1. External forces

• 1. Both internal and external forces

• 1. A body that is not influenced by any force

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Two forces acting on an object are perpendicular to one another. How would you draw these in a free-body diagram?

• 1. The two force arrows will be drawn at a right angle to one another.

• 1. The two force arrows will be pointing in opposite directions.

• 1. The two force arrows will be at a 45° angle to one another.

• 1. The two force arrows will be at a 180° angle to one another.

A ball rolls along the ground, moving from north to south. What direction is the frictional force that acts on the ball?

• 1. North to south

• 1. South to north

• 1. West to east

• 1. East to west

Tags

NGSS.MS-PS2-2

How do you express, mathematically, that no external force is acting on a body?

• 1. F_net = −1

• 1. F_net = 0

• 1. F_net = 1

• 1. F_net = ∞

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2