Unit 6 Review - PS

Why do the brakes in a car not stop you?

• an object in motion stays in motion unless something acts upon it

• you are invincible and nothing can affect you, mwahahaha

• Humans are more difficult to stop than cars

• only a balanced force can stop you from moving

Tags

NGSS.MS-PS2-2

You are sitting in a chair not moving (at rest). What force is still acting upon you?

• mechanical force

• magnetic force

• electrical force

• gravitational force

Tags

NGSS.MS-PS2-4

In a distance versus time graph, the slope represents

• speed

• acceleration

• velocity

• force

If the line on a distance versus time graph is straight it means speed is _________________ and forces are _____________________.

• constant, unbalanced

• constant, balanced

• changing, unbalanced

• changing, balanced

Tags

NGSS.MS-PS3-1

You push a box across the floor. What force(s) are being applied to the box?

• gravity

• friction

• push (applied)

• all of them

Tags

NGSS.MS-PS2-2

A book sits on a bookshelf. Which describes the forces acting on the book

• the forces are balanced, gravity pushes the book down equal to the force of the shelf pushes the book up

• the forces are balanced, gravity pushes the book down equals friction being applied

• the forces are unbalanced, gravity is pushing down on the book harder than any other force

• the forces are unbalanced, gravity equals the force of the shelf on the book

Tags

NGSS.MS-PS2-4

Which statement is true about mass and weight?

• mass is a measure of gravity and matter

• weight is a measure of matter

• mass and weight are the same

• mass = matter

  weight = mass + gravity

If an object is moving at constant speed. What would be needed to change speed or direction?

• balanced force

• unbalanced force

• short amount of time

• long amount of time

Tags

NGSS.MS-PS2-2

A cheetah is running at 20 m/s. How far would the cheetah run in 5 seconds?

• 100 meters

• 4 meters

• 25 meters

• 15 meters

You accidentally drop your phone in a swimming pool. Which forces are acting upon your phone as it sinks?

• gravity pushing up and the water pushing down

• gravity pushing down and the water pushing down

• gravity pushing down and the water pushing up

• gravity pushing up and the water pushing up

Tags

NGSS.MS-PS2-4