Exercise 3:
Rhonda, who has a mass of 60.0 kg, is riding at 25.0 m/s in her sports car
when she must suddenly slam on the brakes to avoid hitting a dog crossing
the road. She is wearing her seatbelt, which brings her body to a stop in
0.400 S. a) What average force did the seatbelt exert on her? b) If she had not
been wearing her seatbelt, and the windshield had stopped her head in
1.0 X 10s, what average force would the windshield have exerted on her?
c) How many times greater is the stopping force of the windshield than the
seatbelt?
a.
b.
c.

Help plz!!!

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.