2. You throw a 2 kg ball upward with an initial velocity of 20 m/sec. About 4 seconds later, the ball returns and you catch it.
9.8 m/s
0.0 m/s
o o o o
4.9 m/s
19.6 m/s
CLEAR ALL
What is the magnitude of the velocity at the top of the ball's upward path? (Neglect
Friction and assume on or near the earth's surface.]

graph question answered .. you think better when you are relaxed and happy

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards