Forces
The sum of all forces acting on an object.
What is net force?
A 60 kg object accelerates to the left at 8 m/s/s. What is the force acting on the object?
What is 480 N to the left?
Grab a whiteboard and draw a free-body diagram of graph 100.
What is balanced on all sides? Check key.
Newton's 3rd Law states that if I push a tennis ball, the tennis ball pushes me back with equal force. The tennis ball still accelerates because...
What is an unbalanced force acting on the tennis ball?
Force is a ____________ quantity. It has _________ and ________.
What is vector, magnitude and direction?
Assuming your acceleration stays constant, describe the relationship between force and mass.
What is as mass increases, force increases?
An object has a mass of 50 kg. What is the gravitational force of the object?
What is 490 N down?
Grab a whiteboard and draw a free-body diagram of graph 200.
See key.
These two things can be described with an inverse relationship.
What is mass and acceleration?
The weaker the gravitational field, the ______ _______ exerted on an object within that field.
What is the less force?
A force resulting from the interaction between an object and a non-slack rope, wire, chain, etc.
What is tension force?
Tommy pushes a 30 N box with a force of 50 N right. Jenna pushes the same box with a force of 75 N left. What is the net force?
What is 25 N left?
Grab a whiteboard and draw a free-body diagram of graph 300.
See key.
Interacting force pairs are not the same as balanced forces because...
What is they are two separate objects?
If an object is accelerating to the right and experiencing friction, what must be true about the force applied and the force of friction?
What is the force applied must be greater than the force of friction?
Two forces acting on an object with equal magnitude, but opposite directions. This object is either not moving or moving with constant velocity.
What are balanced forces?
A 50 kg object is falling from a tree. What is the acceleration?
What is 9.8 m/s/s down?
Grab a whiteboard and draw a free-body diagram of graph 400.
See key.
If an object is balanced.. what three things could possibly be happening to it?
What is constant velocity, no motion or no acceleration?
The flower pot is hanging on the porch. Describe the direction of the tension force.
What is tension force up? (direction of the pull)
A force that results from an interaction between an object and a surface--always pointing perpendicular to the surface. On a whiteboard, draw an example of this.
What is normal force?
Picture a free body diagram: 30 N up (Fn), 30 N down (Fg), 45 N right (Fapp), 60 N left (Ff). Find the net fore, mass & acceleration.
What is 15 N left?
What is 3.06 kg?
What is 4.9 m/s/s left?
Grab a whiteboard and draw a position v. time, a velocity v. time graph AND a free-body diagram of an object with no motion.
See key.
An object has a weight of 170 N down. What is the mass? Use high school problem solving standards on a whiteboard!
What is 17.35 kg?
A snowboarder is going down a snowy hill. Grab a whiteboard and draw all the possible forces acting on the snowboarder.
This diagram should have normal force, gravitational force, frictional force and applied force. See key.