HELP ME PLSS A tennis ball is thrown vertically upward
with an initial velocity of +7.5 m/s.
What will the ball's velocity be when it
returns to its starting point? The acceleration
of gravity is 9.81 m/s?.
Answer in units of m/s.
2
part 2 of 2
How long will the ball take to reach its
starting point?
Answer in units of s.

the answer is b i think

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

higher potential

explanation:

because it is in a high speed so it must move into a of high potential

elctricity and magnet is conversion to it