Forces 1
Forces 2
Forces 3
Newton
Calculations
100
What unit is force measured in?
Newtons
100
Define force
A push or pull resulting from interacting objects
100
What is mass?
The amount of stuff (or particles) in an object
100
Which force occurs from a surface pushing against an object?
Normal Force (Fn)
100
Two teams are playing tug of war. The rope is perfectly still. What is the sum of forces (aka net force)?
Net force = 0
200
Do balanced or unbalanced forces result in a change in motion?
unbalanced force
200
Two forces equal in size and acting in opposite directions on an object.
Balanced Forces
200
What would happen to your weight if you went to the moon?
It would decrease.
200
Which force occurs from a rope or string being pulled?
Tension Force (Ft)
200
How much does a 200 kg car weigh on Earth?
2000 N
300
A force caused by the rubbing of one object or surface against another
friction
300
Give an example of a field force
Gravity (Fg)
300
What would happen to your mass if you went to the moon?
It would stay the same!
300
True or false: You need motion in order for the force of friction to act on an object
False
300
The mass of a rock is 3 kg on earth. What is the mass of the rock on the moon?
3 kg
400
The force that gravity exerts on your mass is more commonly called _____
weight
400
A force vector always has what two parts?
magnitude (size) and direction
400
What is the net force?
Net force = 2 to the left
400
If forces are balanced, what is the sum of forces?
Zero
400
A truck collides into a small tree. Which exerts a greater force, the tree on the truck, or the truck on the tree?
They exert the same amount of force on one another.
500
In a game of tug-of-war, 8th graders pulled with 400 N to the right and 6th and 7th graders pulled with 350 N to the left. Who won the tug-of-war and what was the net force (include vectors).
50 N to the right
500
A person pushes a box down the hallway. Name the forces that are acting on the object (or draw a force diagram)
Fg, Fn, Fa, & Ff
500
Mike pushes a box with a force of 10 N to the right and Lisa pushes with a force of 3 N to the left. Find the net force applied to the box.
Net force = 7 N to the right
500
Why would your weight decrease on the moon?
The gravitational field is less than on Earth.
500
What is the weight of an 80 kg man on the moon?
130.4 N