Question

An athlete lifts a 330 N set of weights from ground level to a position over her head, a vertical distance of 2.05 m. Assume the weights are moved at constant speed. a) How much work does the athlete do? b) What is the mass of the weights?​

Answer 1

• Force=330N
• Distance=2.05m

Work done:-

• Force×Displacement
• 330(2.05)
• 676.5J

Now

Apply Newtons second law

• F=ma

m is mass

a is acceleration due to gravity (10)

• 330=10m
• m=33kg