Physical Science Course Review

Which of the quantities below represents a velocity?

• 25 m/s

• 15 mi/h eastward

• 3 mi/h

Which of the following is NOT accelerating?

• a ball being juggled

• a satellite circling the Earth.

• a braking cyclist

A book is sitting on your desk. Which of the following best describes this situation?

• There are no forces acting on the book.

• There are balanced forces acting on the book.

• There are unbalanced forces acting on the book.

Tags

NGSS.HS-PS2-1

An object's speed is a measure of

• how fast the object is moving.

• the object's direction.

• the object's displacement per unit of time.

Tags

NGSS.MS-PS3-1

Newton's first law states: An object at rest remains at rest and an object in motion remains in motion unless acted on my an unbalanced force.

• True

• False

The newton is a measure of

• mass.

• length.

• force.

___________ is a force that opposes the motion between two objects in contact with each other.

• Motion

• Acceleration

• Friction

_________ is defined as force acting over a distance.

• Power

• Work

• Energy

Tags

NGSS.MS-PS3-5

A perpetual motion machine is impossible because

• machines require energy input.

• machines do not require energy input.

• there isn't much friction.

Hydroelectric power is a(n) _______________ energy source.

• nonrenewable

• renewable

• nuclear