A high school athlete is in the weight room training for wrestling season. He is trying to bench press a bar loaded with 100 kg. How much force must he exert to lift the loaded bar and overcome the force of gravity?

Question

Remember that a= 9.8 m/s 2
.(1 point)
Responses

980 N
980 N

109.8 N
109.8 N

9800 N
9800 N

10.2 N

Answer 1

To calculate the force that the athlete must exert to lift the barbell and overcome the force of gravity, we can use the formula:

\[ F = m \cdot g \]

where:

• \( F \) is the force in newtons (N),
• \( m \) is the mass of the barbell in kilograms (kg),
• \( g \) is the acceleration due to gravity (approximately \( 9.8 , \text{m/s}^2 \)).

In this case, the mass \( m \) is 100 kg. Plugging in the values:

\[ F = 100 , \text{kg} \cdot 9.8 , \text{m/s}^2 \] \[ F = 980 , \text{N} \]

Therefore, the athlete must exert a force of 980 N to lift the loaded bar.

The correct response is:

980 N