Work, Force, Motion Review

All of the following are examples of acceleration except -

• changing directions

• standing still

• slowing down

• speeding up

Which of Newton's Laws of Motion states that for every action, there is an equal and opposite reaction.

• 1st

• 2nd

• 3rd

Tags

NGSS.MS-PS2-1

Finding the ratio of a machine's output force/input force gives you the machine's —

• wattage

• power

• mechanical advantage

• mechanical effciency

Simple machines are used to -

• do all of the work for you.

• make the workload lighter.

• do nothing. They are no help.

Which of these simple machines changes the speed of resistance?

• lever

• screw

• pulley

• wheel and axle

Speed is -

• the distance an object travels in a given time.

• the direction an object travels in a given time.

• the rate that the velocity changes.

Tags

NGSS.MS-PS3-1

The difference between speed and velocity is that velocity includes -

• acceleration

• direction

• time

• distance

In the formula used to find speed, what does the s represent?

s = d/t

• direction

• distance

• displacement

Newton's 2nd Law of Motion states that acceleration depends on the net force acting on an object and its -

• weight

• height

• mass

• width

Tags

NGSS.MS-PS2-2

In an experiment, the dependent variable is the item measured and the independent variable is the item -

• that stays the same.

• that is changed.

• that is removed.