Question

The work done in holding a 50-kg object at a height of 2 m above the floor for 10s is:

a) 0 J
b) 250 J
c) 1000 J
d) 98000 J

Answer 1

The work done in holding a 50-kg object at a height of 2 m above the floor for 10s is 980 J.

Step-by-step explanation:

The work done in holding a 50-kg object at a height of 2 m above the floor for 10s is given by the formula:

Work = Force x Distance

The force acting on the object is equal to its weight, which is given by:
Force = Mass x Acceleration due to gravity
Force = 50 kg x 9.8 m/s²
Force = 490 N

Distance = 2 m

Therefore, the work done is:
Work = 490 N x 2 m
Work = 980 J

So, the correct answer is d) 980 J.