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An 84 kg weightlifter exerts a 960 N force upward against a 77 kg barbell. How large is the net vertical force acting on the barbell?

Answer :

Final answer:

The net vertical force on the barbell is the difference between the upward force exerted by the weightlifter (960 N) and the downward force of gravity (754.6 N), resulting in a net force of 205.4 N upward.

Explanation:

the net vertical force acting on a barbell being lifted by a weightlifter. To determine the net force, one must consider both the force exerted by the weightlifter and the force of gravity acting on the barbell. The force of gravity can be calculated by multiplying the mass of the barbell by the acceleration due to gravity (9.8 m/s2).

In this case, the force of gravity on the barbell is:
77 kg × 9.8 m/s2 = 754.6 N
The weightlifter exerts an upward force of 960 N.

To find the net vertical force, subtract the force of gravity (754.6 N) from the force exerted by the weightlifter (960 N):Net Force = 960 N - 754.6 N = 205.4 N (upward)In this physics problem, the net vertical force acting on the barbell is calculated by considering the forces exerted by the weightlifter and gravity. The solution shows that the net force acting on the barbell is 205.4 N upward.

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