Answer:
60 J
Explanation:
Potential Energy: This can be defined as the energy possessed by a body, due to its position. The S.I unit of potential energy is Joules. The Formula of potential energy is given as
Ep = mgh or
Ep = Wh ................ Equation 1
Where Ep = Potential energy of the box, W = Weight of the box, h = Height.
Given: W = 20 N, h = 3 m.
Substitute into equation 1
Ep = 20×3
Ep = 60 J.
Hence the gravitational potential energy of the box = 60 J
Answer:
no
Explanation:
it is faster at the equator
A, because of the rule of action-reaction pairs
Answer:
Chloroplasts convert light energy into sugars that can be used by the cells. This conversion creates 'food' for the plant.
Explanation:
Answer:
29.4m/s
Explanation:
Given parameters:
Time = 3s
Unknown:
Average velocity = ?
Solution:
To solve this problem, we use the expression below:
v = u + gt
v is the average velocity
u is the initial velocity = 0m/s
g is the acceleration due to gravity = 9.8m/s²
t is the time
So;
v = 0 + (9.8 x 3) = 29.4m/s