The SI unit of force is the _________.

• joule

• kilogram

• meter

• newton

When an unbalanced force acts on an object,

• the object's motion does not change.

• the object accelerates.

• the weight of the object decreases.

• the inertia of the object increases

Tags

NGSS.MS-PS2-2

As you push a cereal box across a tabletop, the sliding friction acting on the cereal box

• acts in the direction of motion

• equals the weight of the box

• is usually greater than the static friction

• acts in the direction opposite of motion

Tags

NGSS.MS-PS2-2

The forces acting on a falling leaf are

• air resistance and fluid friction

• gravity and air resistance

• gravity and static friction

• weight and rolling friction

Tags

NGSS.MS-PS2-2

Projectile motion is caused by

• the downward force of gravity

• an initial forward velocity

• a final vertical velocity

• the downward force of gravity and an initial forward velocity

Tags

NGSS.HS-PS2-4

An orange might roll off your cafeteria tray when you stop suddenly because of

• the balanced forces acting on the orange.

• the centripetal force acting on the orange.

• the frictional forces acting on the orange.

• the orange's inertia

Tags

NGSS.MS-PS2-2

If a force of 9 N is applied to an object with a mass of 3 kg, the object will accelerate at

• 27 m/s²

• 0.33 m/s²

• 3 m/s²

• 0.17 m/s²

Tags

NGSS.MS-PS2-2

Your weight equals your

• mass

• mass $\div$ net force

• mass $\times$ acceleration due to gravity

• mass $\times$ speed

Tags

NGSS.MS-PS2-4

Newton's 3rd law of motion describes

• action and reaction forces

• balanced forces

• centripetal forces

• net force

Tags

NGSS.MS-PS2-1

What is conserved when two objects collide in a closed system?

• acceleration

• momentum

• speed

• velocity

Tags

NGSS.MS-PS2-1