A book with a mass of 1.53 kg is lifted from the ground to a height of 4.0 meters. The increase in the book’s gravitational potential energy is approximately a. 64 J
b. 60. J
c. 599 J
d. 64 J
e. Others

Which quantity is not a vector?
a. Momentum
b. Impulse
c. Acceleration
d. Force
e. Mass

40. joules of work is required to push a 2.0-kilogram box up the full length of a ramp that is 8.0 meters long. What is the magnitude of the force applied to the box to do this work?
a. 20. N
b. 5.0 N
c. 25 N
d. 80. N
e. Others

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Can anybody me with this? ? (picture included.)

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.