Equations
Force mass and accelerations hands on and sim
Vocabulary 1
Vocabulary 2
Vocabulary 3
Designing Wheelchairs
Mousetrap cars
100

What is the equation for force?

mass X acceleration

100

Which object was more affected by a 2 newton force the pingpong ball or the golf ball? Why?

ping pong ball because it has less mass

100

What is a push or a pull exerted on and object called?

force

100

This is the force that opposes the motion of an object that rolls across a surface.

rolling friction

100

These are forces that are equal in strength but opposite in direction.

balanced forces

100

Why do Engineers make different wheelchairs?

To meet the needs of their users.

100

What is the goal of our mousetrap car competition?

Build a car that goes the longest distance

200

What are the units for force

Newtons

200

What was more affected when struck four times with the hammer in the sim, a .5 kilogram mass or a 4 kilogram mass? Why

a .5 kilogram mass because it has less mass

200

What is speed in a given direction called?

velocity

200

This is a force that opposes the motion of an object that slides across a surface.

sliding friction

200

These are forces that are unequal in strength and opposite in direction.

unbalanced forces

200

How are racing wheelchairs designed to fit two needs of their users?

They are lighter so their applied force is greater causing them to go faster. 

It is easier for them to stop the chair at the end of the race.

200

What happens to the force applied by the mousetrap if we increase mass of the mousetrap?

it is reduced

300

What are the units for acceleration?

meters per second squared

300

If the ping pong ball collides with the golf ball how will the forces in the collisions compare, and which ball will have a less acceleration?

The forces are equal in strength and opposite in direction and the golf ball will have less acceleration.

300

What is a force that opposes the motion of an object called?

friction

300

This is a force that opposes the motion of an object caused by matter that flows.

fluid friction

300

How fast an object travels.

speed

300

How do Rugby wheelchairs support the needs of their users?

THey have more mass, so it prevents players from toppling over in a collision.


300

Which wheel will reduce rolling friction best, a drag wheel or cd wheel?

cd wheel

400

An object accelerates at 2 meters/second2, how fast will it move after 4 seconds?

8 meters per second

400

Calculate the force of a ping pong ball that collides with the ground if the mass is .0000015 kilograms and its acceleration is 10 meters/second2.

.000015 Newtons

400

What are the two upward forces that work on objects called?

Normal and buoyant

400

This is a force that opposes the motion of an object between two objects that touch but do not move in relation to each other, often allowing objects to start or stop.

static friction

400

This is a force exerted on an object by a surface that opposes the downward force of gravity.

normal

400

How does the force required to move compare in the picture below?

A Rugby wheelchair requires more force to move.

400

Which ways do wheels on your mousetrap car exert force on the ground?

down and back

500

What is another way we can write  1Newton?

 1 kilogram X 1 meter/second2

500

How did the ping pong ball lab relate to collisions?

It shows us that in a collisions a lighter mass will have a greater acceleration even though forces are the same.

500

The effect of gravity on mass is called?

weight

500

What are the four forces of friction called?

fluid, sliding, rolling and static


500

This is the force of attraction between two objects that have mass.

gravity

500

What are three design requirements that engineers consider when designing wheelchairs?

budget, users personal style, users needs

500

What are the design requirements of our mousetrap car?

it must cost less than two dollars to make, it must be solely powered by one mousetrap

600

The mass of a bowling ball is 6 kilograms, it's acceleration is 10 meters/second2, how much force is exerted on Mrs. Jameson's foot when she drops it?

60 Newtons

600

What are three things you should include in your reasoning statement when we conduct labs?

restate your hypothesis

include data you collected

explain whether data supported or refuted your claim

600

What are the four forces of friction called?

static, fluid, rolling, sliding

600

The fluid friction exerted on a hockey pucks is 5 newtons and the sliding friction of the ice is 20 newtons, what is the net force and direction of the puck if the puck has an applied force of 80 newtons.

55 newtons

600

What happens to the affect of gravity as masses get closer together and have large masses?

The force increases.

600

What were three properties that meet the needs of tennis players in wheelchairs?

light, strong and easy to adjust quickly

600

A mousetrap car goes 2 meters in 6 seconds, what is its speed in meters per second?

.33 meters per second

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