For Questions 4-8, calculate (a) the Mechanical Advantage MA, (b) the effort required to lift the load, and (c) the quantity of rope pulled to raise the load the given distance.

a
Effort
E
b
С
490 N lifted 3 inches
5.
4 meters
b
1960 N
lifted 1
meter
b
Effort
150 lbs
lifed 12 ft

Jasmine is diving off a 3-meter springboard. her height in meters above the water when she is x meters horizontally from the end of the board is approximated by the equation h=-x^2+3x+3. what is the maximum height jasmine will reach on her dive?

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative