Question

Lamar Gant, a U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position at or near the waist. Determine the work done by Lamar in deadlifting 3.03x10⁵ g to a height of 77 cm above the ground. How much work did Mr. Gant do on the barbell during this amazing feat?

A: 3.12 x 10³ N x m
B: 3.12 x 10⁶ N x m
C: 2.29 x 10⁵ N x m
D: 3.12 x 10⁵ N x m
E: 2.29 x 10⁸ N x m
F: 2.29 x 10³ N x m

Answer 1

The work done by Lamar Gant in deadlifting the barbell can be calculated using the formula for work, which is equal to force multiplied by distance. By converting the mass of the barbell from grams to kilograms and calculating the weight using the formula weight = mass x gravitational acceleration, we can determine the work done by Lamar Gant to be 3.12 x 10⁵ N x m.

Step-by-step explanation:

To determine the work done by Lamar Gant in deadlifting 3.03x10⁵ g to a height of 77 cm above the ground, we can use the formula for work: work = force x distance. In this case, the force exerted is equal to the weight of the barbell, which is given by the formula weight = mass x gravitational acceleration. The gravitational acceleration on Earth is approximately 9.8 m/s².

First, let's convert the mass of the barbell from grams to kilograms: 3.03x10⁵ g = 3.03x10² kg.

Next, let's calculate the weight of the barbell: weight = mass x gravitational acceleration = (3.03x10² kg) x (9.8 m/s²).

Now, we can calculate the work done by Lamar Gant by multiplying the weight of the barbell by the height it was lifted: work = weight x height = (3.03x10² kg x 9.8 m/s²) x 77 cm.

Finally, let's convert the answer to scientific notation:

work = 3.12 x 10⁵ N x m.