Force
What is Acceleration?
increase in motion (speeding up)
Balanced force
Does unbalanced force cause an object to move?
yes
what is Newtons 1st law?
an object at rest stays at rest and an object in motion stays in motion unless another force acts upon it
Mike lifted a heavy box. What force did he have to overcome to move the box upward?
Gravity
Ms. Starling's class and Ms. Howard's class are playing tug-of-war. After several minutes, the students notice that the rope has not moved at all. What is one possible cause of this?
Balanced Force
When a tennis ball and a bowling ball are thrown down a hill you observe that the bowling ball rolls faster down the hill. What force is pulling the ball down and why is it moving faster?
gravity and it moves faster because its mass is more
Explain why a parachute makes a person falling from a great height fall more slowly?
The parachute causes air resistance, which slows the fall.
What keeps objects in orbit
gravity
What two forces are acting together to keep a paper balanced on the floor?
gravity and friction
When two magnets have the same pole (N,N or S,S) the magnets push each other apart. What force causes the magnets to push apart?
magnetic force
What is Newtons 3rd law?
for every action there is an equal and opposite reaction
What is a type of force keeps a boat from sinking?
buoyancy
When on a play ground you notice that two kids jump on the seesaw, but the seesaw does not move up or down. Why does the seesaw not move?
because the students both have equal mass. Which means they have created a balanced force
A toy car rolling along different surfaces will experience different amounts of friction. A toy car would encounter the most friction when rolling on which surface?
rough surface
How many types of force are there?
6
What type of force works between two surfaces rubbing against each other. It works against the motion of an object?
Friction
There was a bad storm the other night that caused a tree branch to break off and land in the pond. You observe that the tree branch is floating, what two forces are working together to cause the tree branch to float making a balanced force?
gravity and buoyancy
A car and a truck travel at the same speed on a road in the same direction. Both vehicles slow down with the same stopping force. Why does the truck need more distance the the car to stop?
the mass of the truck is more and the surface area of the truck is more
What are the names of the 6 forces?
magnetic
friction
gravity
buoyancy
air resistance
applied force