Forces cont.
When the forces on an object are balanced, they are _____ and ______.
Equal and opposite
Newton's 3rd law of motion states for every force exerted there is an ______ and ________ force
equal and opposite
Net force is...
The total amount of forces acting on an object.
Is more force needed to move an object on a rough surface or a smooth surface? Why?
Rough surface, because their is more friction.
When the forces on an object are unbalanced, they are __________ and _________
opposite and unequal.
Explain how Newton's Third Law applies to skateboarding when a skater does a kickflip.
The skater exerts a force through the skateboard onto the ground, and the ground exerts a force back onto the skateboard, causing it to fly upwards.
Thad pushed on table 5 with a force of 10 N to the right and Krant pushed on the same table, to the left, with a force of 21 N. What is the net force and in what direction?
11 N to the left
As mass increases, the amount of force needed to move the object ________'s.
Increases
When unbalanced forces are applied to an object it begins to ____________.
Move
When I push the cart against the wall with a force of 1000 N, it doesn't move. How can you explain what happened?
The wall pushed back with a force of 1000 N
Team A pulls on a rope with 12,000 N of force. Their is a stink pit in the middle. How much force does Team B need to pull with to get Team A into the stink pit?
More then 12,000 N of force
Force is an interaction between _____ objects
Two
When balanced forces are acting on an object, the object is ________
not moving.
When you slapped the table with your hand, explain why it hurt and made a sound.
The table hit back with the same force, and the energy was transferred to sound
Bambam pulls on the cart, to the right, with a force of 38 N. Boomboom pulls on the cart to the left with a force of 14 N. What is the net force and in what direction?
24 N to the right
An object in motion has ______ energy.
Kinetic
.78 Newtons are being applied doing to the right, and are .7 newtons are being applied to the left. Where will the ball roll?
it will go right
Three tablemates are at a table trying to grab a glue stick box. Seat A and Seat B are pulling the box towards themselves. Seat C is pulling the box towards themselves. The box is not moving. The forces being exerted by the students are 100 N, 300 N and 400 N. How much force is Seat C pulling with?
400 N
One scientist conducts thought experiments on forces, another conducts experiements with actual objects. They both make claims about how forces work. Which has better evidence and why?
The scientist who used actual objects because they can be observed by others and tested multiple times.