Questions 3-4 A 1kg ball is released from rest from an initial height of 1m, rolls down and is brought to rest from a spring as it
compresses a distance x as shown in the figure. Assume NO
energy losses to the surrounding environment:
lego
3. The kinetic energy of the cart at point B is nearly
(A) 5 (B) 10) (C) 20 J (D) 40 )
(E) 80J

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8