Force, Acceleration, and Mass

Which of these statements is true for a falling body

• the faster it falls, the bigger the frictional forces will get

• the resultant force will be zero when it reaches terminal velocity

• the resultant force gets smaller and smaller as it accelerates

• it will keep getting faster and faster for ever

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

How many Newtons of frictional force will there be if a 600N girl with a 200N parachute falls in freefall until she reaches terminal velocity

Tags

NGSS.MS-PS2-2

How confident do you feel about using the F=ma equation?

• Yes I get it

• OK, I'll get it in the end

• bit wobbly

• what are you talking about

Tags

NGSS.MS-PS2-2

The unit of Force is

What is the force on a 1000 kg elevator that is falling freely at 9.8 m/sec²

• 102.04 n

• 9,800 n

• 980 n

• 103 n

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is the acceleration of a 50 kg object pushed with a force of 500 newtons?

• 100 m/s²

• 25,000 m/s²

• 10 m/s²

• 25 m/s²

Tags

NGSS.MS-PS2-2

A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec².  What is the mass of the object?

• 100kg 

• 1,250kg

• 50kg

• 5kg

Tags

NGSS.MS-PS2-2

You give a shopping cart a shove down the isle. The cart is full of groceries and has a mass of 18 kg. The cart accelerates at a rate of 3 m/s². How much force did you exert on the cart?

• 6N

• 54N

• 21N

• 18N

Tags

NGSS.MS-PS2-2

If a 2kg bird is pushed by the wind with a force of 2N, how fast does the bird accelerate?

• m

• m/s²

• 4m/s²

• m/s²

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Newton's law of motion describes the relationship of force, mass, and acceleration. Write the equation.

• M=F/A

• F=MA

• A= F/M

• All of the above