Answer:
New potential energy will be 784 J
So option (b) will be correct answer
Explanation:
We have given height of the shelf h = 10 m
Potential energy E = 980 J
Acceleration due to gravity
We know that potential energy
So
m = 10 kg
Now new height h = 8 m
So new potential energy
So option (B) will be the correct answer
Answer:
I think it should be D
Explanation:
This is because the arrow pointing right is bigger than the arrow pointing left. Hence we can conclude the the force acting on the right is greater and hence it is accelerating
Making a drawing of the system, we will have two forces which are tension and the weight of the object. Balancing the forces present, we do as follows:
T = W
W = 30 N
Therefore, weight is equal to 30 N. Hope this answers the question. Have a nice day. Feel free to ask more questions.
I am pretty sure its B i hope i helped ;p but sry if i got u wrong