HELP PLEASE FOR A FINAL (NO LINKS PLEASE)
Caveman Bob is the first from his clan to use a lever. He grabs a 3m tree branch and places it over a boulder (fulcrum). He then pulls down on the branch with a force of 500N and the other end lifts the 3500N carcass of the sabertooth tiger 1m off the ground. What is the mechanical advantage of the lever (2pts)?

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward