1. A skydiver is falling from a plane. They have a weight of 1500 N and have reached terminal velocity.
a. Draw the FBD for the skydiver.
b. What is the weight of the skydiver? ___________________ N
c. What is the Net Force on the skydiver? _________________ N
d. What is the force of air resistance acting on the skydiver? __________________ N
2. Joe is pushing horizontally with a force of 500 N on a crate sitting at rest on the floor. The crate has a weight of 600 N. The crate has not begun to accelerate.
a. Draw the FBD for the crate
b. What is the weight of the crate? ______________ N
c. What is the normal force acting on the crate? ______________ N
d. What force is being applied to the crate? __________________ N
e. What is the net horizontal force acting on the crate? ______________ N
f. Why type of friction is present between the crate and the floor? _____________
g. What is the force of friction acting against Joe? ________________ N 1
3. Tim is dragging a sack of potatoes across the floor. The potatoes have a weight of 100 N. He is applying a force of 60 N to the right and the potatoes are moving at a constant velocity.
a. Draw the FBD for the potatoes.
b. What is the weight of the potatoes? _____________________ N
c. What is the normal force acting on the potatoes? _____________ N
d. What is the magnitude of the applied force on the potatoes? ___________ N
e. What is the net force along the horizontal acting on the potatoes? _______________ N
f. What is the magnitude of the force of friction acting on the potatoes? ________________________ N
g. Is the friction static or kinetic? _____________________
4. A car is traveling down the street. All four tires are rolling in relation to the ground.
a. What type of friction is present between the tires and the ground while they are rolling? _________________ Why?
b. If the driver of the car, panics and hits the brakes, locking the wheels and tires up, what type of friction is now present between the tires and the road? ________________ Why?
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