25me figure this out

part one:
an 18.7 kg block is dragged over a rough, horizontal surface by a constant force of 104 n
acting at an angle of 26.6◦
above the horizontal. the block is displaced 51.9 m, and the
coefficient of kinetic friction is 0.223.
find the work done by the 104 n force. the acceleration of gravity is 9.8 m/s^2.
answer in units of j.

part two:
find the magnitude of the work done by the
force of friction.
answer in units of j.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j