Coach Zelden Science Exam

what are two things that determine the force of gravity?

• mass and distance

• distance and time

• mass and time

• time and displacement

What is the equation for speed?

• s= mgh

• s = 1/2mv^2

• s = d/t

• s = Ir

State Newton’s first law.

• Every action has an equal and opposite reaction.

• An object in motion stays in motion unless an outside force acts upon it.

• A force that opposes motion of objects through the air.

• A push or a pull.

Explain why a thrown ball curves downward.

• Air resistance

• Gravity

• Speed

• Mass

What are the 3 ways to get acceleration?

• increase mass, increase gravity, and change direction

• speed up, slow down, and increase mass

• speed up, slow down, and change direction

• speed up, increase gravity, and change directon

Define acceleration

• the rate of change of velocity

• the rate of change of mass

• the rate of change of air resistance

What is the unit for speed

• meters

• miles

• air resistance

• meters per second

What is the equation for acceleration?

• a = d/t

• a = vf- vi/t

• a = mgh

• a = m/s

State Newtons third law

• An object in motion stays in motion unless an outside force acts upon it

• When an unbalanced force is applied to an object, it causes it to move.

• Every action has an equal and opposite reaction.

• An opposing force acting on an object.

Why does a piece of paper fall slower than a brick

• direction

• mass

• speed

• Air resistance