Pepper pulls a 20.0 kg object along the floor accelerating at 2 m/s/s, and μ = .2. How much work has he done while pulling the string 5.0 m? If it takes her 1.0 seconds, how much power has she used? If 1.0 kcal = 4184 J, and an Oreo has 50 kcal, how many Oreos did Pepper have to eat to get the above done?

To calculate the work done by Pepper while pulling the object, we can use the equation:

Work = Force * Distance

The force can be calculated using Newton's second law of motion:

Force = Mass * Acceleration

Here, the mass (m) of the object is 20.0 kg and the acceleration (a) is 2 m/s². So the force would be:

Force = 20.0 kg * 2 m/s² = 40 N

Now, we can calculate the work done:

Work = Force * Distance
Work = 40 N * 5.0 m
Work = 200 J

So Pepper has done 200 Joules of work while pulling the string for 5.0 meters.

To calculate the power, we use the equation:

Power = Work / Time

Here, the time taken is 1.0 second. So the power used would be:

Power = 200 J / 1.0 s
Power = 200 W

Therefore, Pepper has used 200 Watts of power.

To calculate the number of Oreos Pepper ate, we need to convert the work done (200 J) to calories using the conversion factor:

1.0 kcal = 4184 J

First, let's convert the work done to kilocalories:

200 J * (1.0 kcal / 4184 J) = 0.048 kcal

Since 1 Oreo has 50 kcal, we can divide the work done in kilocalories by the energy content of an Oreo:

0.048 kcal / 50 kcal/Oreo = 0.00096 Oreos

Therefore, Pepper had to eat approximately 0.00096 Oreos to get the work done.

To find out how much work Pepper has done while pulling the object, we can use the formula for work:

Work (W) = Force (F) × Distance (d) × cos(θ),

where the force is the product of mass (m) and acceleration (a): F = m × a,

and θ is the angle between the direction of the force applied and the direction of the displacement.

Given values:
Mass (m) = 20.0 kg
Acceleration (a) = 2 m/s²
Distance (d) = 5.0 m

First, calculate the force acting on the object:
F = m × a = 20.0 kg × 2 m/s² = 40.0 N

Since Pepper is pulling along the floor horizontally, the angle θ between the force and displacement is 0°, and cos(0°) = 1. Therefore, we can simplify the formula:

Work (W) = F × d = 40.0 N × 5.0 m = 200 J

So, Pepper has done 200 Joules of work.

To find the power used, we can use the formula:

Power (P) = Work (W) / Time (t)

Given value:
Time (t) = 1.0 s

Power (P) = 200 J / 1.0 s = 200 W

Pepper has used 200 Watts of power.

Now, let's calculate how many Oreos Pepper needs to eat to get the above done.

Given conversion:
1.0 kcal = 4184 J
1 Oreo = 50 kcal

First, convert the work done from Joules to kilocalories:
200 J × (1 kcal / 4184 J) = 0.0478 kcal

Now, determine the number of Oreos:
0.0478 kcal / (50 kcal/Oreo) = 0.96 Oreos

Pepper would need to eat approximately 0.96 Oreos to obtain the energy to perform the work.