# Science-Motion Unit Flashcards

## Motion

True or False: Weight is a measure of how much gravity pulls on something.

True

Math related

30 N of force acts on an object with 5 kg of mass. What is the acceleration?

f=ma

6m/s^2

Math related

A 500 N force is applied to an object to generate an acceleration of 4 m/s/s. What is the mass of the object?

f=ma

125 kg

Math related

A 8 kg block is pulled across a table by a horizontal force of 40 N with a frictional force of 8 N. What is the acceleration?

f=ma

4m/s^2

How much net force acts on a bicycle that is moving at a constant speed?

Zero

What is the force that pushes your car forward when you hit the gas pedal?

A force of friction between the tires and the road

Math related

An object with a mass of 10 kg is falling through the air and experiences air resistance of 50 N. Calculate the net force acting on the object.

48 N

I multiplied 10 and 9.8/gravity then subtraced 98 and 50

Calculate the Weight of an object with a mass of 100 kg.

980 N

Multiply 9.8 and 100

Which accelerates the most:

A. Speeds up most shortly

B. Slows down longer

A. Speeds up shortly

An object that speeds up the most over a shorter amount of time

Which object accelerates the most:

A. Large mass pushed with large force

B. Small mass pushed with large force

B. Small mass pushed with large force

Does a bigger object or a smaller object have more inertia?

The bigger object

Math related

How much force is needed to make a 500 N car accelerate at 4 m/s^2?

2000 N

I multiplied 500 and 4

Position over time graph: Zone two going from origin straight out, what is the object doing

Moving backwards and a constant speed

Position over time graph: Zone 1 line is curving up and fowards then sort of becoming straight, what is the object doing

Moving foward and slowing down

Velocity over time graph: Zone 1 line starts at origin and goes straight out, what is the object doing

Moving foward and speeding up