Mechanics | Relativity Answers

A skier moves 100.0 m horizontally, and then travels another 35.0 m uphill at an angle of 35.0º above the horizontal. What is the skier's displacement from his starting point? (Use the graphical method to answer and include your scale on the graph paper.)

a man slides down a telegraphic pole with an acceleration equal to one-fourth of acceleration due to gravity. The frictional between man and pole is equal to in terms of man's weight W.

The depth of water behind The Hoover Dam in Nevada is 165m. What is the water pressure at a depth of 165m? The weight density of water is 9800N/m2

The scale on the horizontal axis is 4 s per
division and on the vertical axis 5 m/s per
division. The initial position is 51 m.
1) What is the initial velocity?
Answer in units of m/s
2) What is the position when t = 0?
Answer in units of m
3) What acceleration is represented by the
graph?
Answer in units of m/s^2

THIS IS THE GRAPH:

http://i.imgur.com/7tUsY.jpg

4) What is the position when t = 32 s?
Answer in units of m

When a handball strikes a vertical wall, its velocity changes from25 m/s [S15°E] to 30 m/s [S40°W]. Determine the handball’schange in velocity

A canon ball is shot horizontally from a point 24 meters above the ground and strikes the ground after traveling a distance of 55 meters. With what speed was it shot?

A child rolls a ball up a ramp and it accelerates at -2.0 m/s^2 after leaving the child's hand. After rolling for 3.5 s, it stops and begins to roll back down. What was the speed of the ball when it left the child's hand?

A 0.05 kg arrow with a velocity of 180m/s is used to shot a 5 kg block of wood off the top of a log. Whats the velocity of the arrow/log after contact?

A 1 kg poodle running right at 3 m/s has an elastic head on collision with a 9 kg basset hound walking left with a velocity of 1 m/s. After the collision the poodle bounces off to the left at 3 m/s. Whats the basset hounds velocity after the collision?

The force vector A has a magnitude of 71.0 newtons (N) and points due east. The force vector B has a magnitude of 145 N and points 74.0 ° north of east. Find the (a) magnitude and (b) direction of A - B. (Give the direction as a positive angle with respect to due east). Find the (c) magnitude and (d) direction of B - A. (Give the direction as a positive angle with respect to due west).