Science final

What is the definition of a force?

• Net force equal 0N and there is no change in the object's motion

• the overall force acting on an object after all forces are combined

• a push or a pull that acts on an object

• The force does not equal 0N, the object accelerates

What is the definition of net force?

• a push or a pull that acts on an object

• Net force equal 0N and there is no change in the object's motion

• the overall force acting on an object after all the forces are combined

• The force does not equal 0N, the object accelerates

Tags

NGSS.MS-PS2-2

What is the magnitude and direction of the force in the free body diagram shown?

• 70 N right

• 70 N left

• 50 N right

• 50 N left

Tags

NGSS.MS-PS2-2

Velocity has two components

(pick 2 below)

• direction

• change in speed

• speed up

• slow down

Acceleration is

• the rate at which velocity changes.

• the change in velocity

• the rate of change

• when you speed up only

What does it mean when a change in velocity is negative?

• The object is speeding up.

• The object is slowing down.

• The object is changing direction.

• The object is falling down.

In each of the following cases, determine where the car has no acceleration ?

• A car shortly after a stoplight turns green.
• A car approaching a red light
• A car with the cruise control set at 80 km/h
• A car turning a curve at a constant speed

Tags

NGSS.MS-PS2-2

Which of the following is a unit for acceleration?

• km/s
• m/s²
• mi/hr
• ft

Acts on object that are not moving

• static friction

• sliding friction

• rolling friction

• fluid friction

Allows you to walk

• static friction

• sliding friction

• rolling friction

• fluid friction