An exerciser lifts 10.00 N weights a vertical distance of 50.00 cm.How many times would the exerciser have to lift the weight to use 10.00 Calories of energy?

Question

Quizplus · Accepted Answer

To calculate how many times the exerciser would have to lift the weight to use 10.00 Calories of energy, we need to use the following formula:

work = force x distance

where work is measured in Joules (J), force is measured in Newtons (N), and distance is measured in meters (m).

We know the force (10.00 N) and distance (50.00 cm or 0.50 m), so we can calculate the work done in lifting the weight once:

work = force x distance = 10.00 N x 0.50 m = 5.00 J

To use 10.00 Calories of energy, we need to do 41,840 J of work (1 Calorie = 4,184 J).

So, the number of times the exerciser would have to lift the weight to use 10.00 Calories of energy is:

number of lifts = (total work required) / (work per lift)

number of lifts = 41,840 J / 5.00 J = 8,368 lifts

Rounding up, we get 8,370. Therefore, the best choice is D) 8,370.

An Exerciser Lifts 10