Homework Help: Physics

Posted by beavis on Thursday, February 16, 2012 at 5:12am.

A driver has 50kg mass, and drives from a high board. On entering the water the driver travels vertically downward and comes to rest in a vertical distance of 5 m. The average resistance force is acting on the driver during the motion to rest in the water is three times her weight. how high is the board?
(please show the formulas you've used..thank you)

Physics - drwls, Thursday, February 16, 2012 at 7:15am
Let F = 3*M*g be the average resistance force in the water. Let d = 5m be the vertical distance the water is penetrated. Let H = the board height above water.

Underwater net force * d = Kinetic energy entering water = Initial potential energy

(F - M*g)*d = M*g*H
2*M*g*d = M*g*H

H = 2 d = 10 m
Physics - beavis, Thursday, February 16, 2012 at 6:56pm
thank youuuuu!

Answer this Question

Related Questions

physics - A driver is running 3.6 m/s and dives out horizontally from the edge ...
physics - A MASS OF A MINUBUS WITH THE DRIVER IS 1 500Kg .ASSUME THAT THE ...
physics - A truck driver attempting to deliver some furniture travels 5 km east...
Physics - A car is initially travelling at a constant speed of 20 m/s along a ...
language - In this case, the injured driver received payment from his own ...
physics - how do i solve this, i tried dividing the mass by the height, but its ...
physics - A test car with a dummy driver of mass 60 kg was propelled towards a ...
physic - A 2,300-kg pile driver is used to drive a steel I-beam into the ground...
Physics - A high diver of mass 52 kg jumps off a board 11 m above the water. If...
physics - Assume the driver has a mass of 70.6 kg . What horizontal force does ...

For Further Reading

First Name:
School Subject:
Answer: