What is the push or pull on an object that can cause it to accelerate called?
Force
100
An example of a contact force is
Friction
100
True or False: a force can make an object slow down or stop.
why?
true
100
Name two non contact forces and give an example...
gravity, you are able to stay grounded ( not float)
magnetism (magnets will attract each other without touching.
100
The heavier something is ( more mass it has...)the more ________ is needed to move it or stop it.
FORCE
200
Are mass and weight the same?
No!
200
A force that can slow you down because of contact
Friction
200
Explain what happens when you dribble a ball?
When you push down on the ball, the ball hits the ground, then when the ball hits the floor, the floor exerts an equal force on the ball and it bounces back towards you.
200
Name one of newtons laws and explain it.
1.there is a natural tendency of objects to keep on doing what they're doing
2.The greater the mass the greater the amount of force needed
3. For every action there is an equal and opposite re-action.
200
Gravity and friction are forces that slow us down and make it more difficult for things to happen. Give me examples of some ways that gravity and friction have a positive effect.
friction- stops us from slipping, creates heat
Gravity- helps up stay grounded (we dont float away)
300
What force would you use to move the keys on a keyboard?
push
300
What type of surfaces would result in more friction?
bumpy, rough
300
Explain what happens when you slip on wet floor.
There is less friction on the surface and you easily slip.
300
Why is it harder to pick something up than to put it down?
Because when you pick something up you are working against gravity and when you put something down you are working together with gravity.
300
Explain why putting something on a cart with wheels makes it easier to carry than dragging it in a box.
The wheels minimize the friction
400
How are foces involved in a baseball game?
Hitting the ball with the bat, catching the ball with the glove, throwing the ball
400
Name a surface that would result in less friction
Ice, smoth surfaces, slippery, wet surfaces
400
What causes a soccer ball to slow down as it moves on the ground
friction
400
A short person kicks a soccer ball, then a tall person kicks a soccer ball with the same force. Which ball travel more?
They will travel the same distance becasue the same force is being used.
400
Using the Newtons laws explain why it is important to wear a seatbelt
An object in motion will stay in motion, so the person in a car will want to keep moving unless something else like a seatbelt stops it.
500
When a basketball players is running through the court to get to the basket, is force involved?
yes, he uses force (by pushing on the groud with his feet) to move.
500
Name two factors that can affectt he amount of friction between two objects
shape, speed, weight, texture...
500
Why do athletes sometimes wear shoes with spikes on the bottom?
it gives them more friction and they are less likely to slip
500
Two marbles are sliding down a ramp, one marble is twice as large as the second. Compare the force needed to stop each marble.
The larger marble will need more force to be stopped than the smaller marble.
500
In a tug of war, when one team is pulling with a force of 100 N (team A) and the other 80 N (Team b) who is winning