Show:
Forces
Motion
Other
100
Give an example of both an unbalanced force and a balanced force?
Unbalanced- Chopping a tree down Balanced- Tug of war that isn't moving
100
Give an example of something that can be used as a reference point.
Tree, chair, wall, flagpole....
100
According to Newton’s third law of motion, when a foot exerts a force on a soccer ball, the soccer ball does what back to the person's foot?
Exerts an equal force back to the person's foot.
200
What is the name for the force that happens when to surfaces rub against one another?
Friction
200
If you describe someone as running 5 mph-West are you talking about speed or velocity?
Velocity- it is directional
200
Newton’s First Law states that an object in motion will stay in motion unless acted upon by an outside force. If you kick a soccer ball, what are at least 2 forces that work to stop the ball?
Gravity, Friction, the goalie's hands, a teammates foot.
300
What is the force that pulls falling objects to the earth?
Gravity
300
If a bike travels 40 meters for 5 seconds, what is its speed? S=d/t
40 m/s / 5 s = 8 m/s
300
Why does your weight change as you move to different planets?
All planets have different amounts of gravity. The amount of gravity pulling is what determines weight
400
What is an example of a surface that has a low amount of friction?
Ice, snow, hardwood floor.
400
If a football is thrown at 15 m/s for 4 seconds, how far did the baseball travel? d=(S)(t)
(15 m/s)(4 s)= 60 m
400
As the mass of an object increases the force of gravity (increases/decreases)? As objects move farther apart the force of gravity (increases/decreases)?
-increases -decreases
500
Why is there no top or bottom on Earth?
Because gravity on Earth pulls everything towards its center.
500
If a car is traveling 60 mph for 360 miles, for how much time has the car been driving? t=d/S
360 miles/60 mph= 6 hours
500
If an elephant and a mouse were dropped at the same time from the same height, which would hit the ground first? Does mass of an object make a difference on the rate at which something falls?
They would hit at the same time. No gravity pulls everything at the same rate.