I think your answer would be DDT, but don't hold me to it
Answer:
What is most widely accepted today is a the giant-impact theory. It proposes that the Moon formed during a collision between the Earth and another small planet, about the size of Mars. The debris from this impact collected in an orbit around Earth to form the Moon.
Answer:
F > W * sin(α)
Explanation:
The force needed for the box to start sliding up depends on the incline (α).
The external forces acting on the box would be the weight, the normal reaction and the lifting force that is applied to make it slide up.
These forces can be decomposed on their normal and tangential (to the slide plane) components.
The weight will be split into
Wn = W * cos(α) (in normal direction)
Wt = W * sin(α) (in tangential direction)
The normal reaction will be alligned with the normal axis, and will be equal to -Wn
N = -W* cos(α) (in normal direction)
To mke the box slide up, a force must be applied, that is opposite to the tangential component of the weight and at least a little larger
F > |-W * sin(α)| (in tangential direction)
A I think it was sorry if not
Answer:
work done he has done is equal to 6452.712 J
Explanation:
given,
Assume the mass of the cheerleader be equal to 70.8 kg
she is lift up off to the height of 0.31 m
acceleration due to gravity = 9.8 m/s²
number of time she was lift = N = 30 times
work done = N W
W = m g h
work done = N m g h
work done = 30 x 70.8 x 9.8 x 0.31
= 6452.712 J
hence, work done he has done is equal to 6452.712 J