Question

question 11 (1 point)
listen
you do 50 joules of work in 5 seconds. what is your power?
10 watts
55 watts
5 watts
250 watts
question 12 (1 point)
listen
holding a heavy box without moving it is doing work.
true
false

Explanation:

Step1: Recall the formula for power

Power \( P=\frac{W}{t} \), where \( W \) is work and \( t \) is time.

Step2: Substitute the given values

Given \( W = 50\space J \) and \( t=5\space s \), then \( P=\frac{50}{5} \).

Step3: Calculate the power

\( P = 10\space W \).

For the second question:

Work is defined as \( W = F\times d\times\cos\theta \) (where \( F \) is force, \( d \) is displacement, and \( \theta \) is the angle between force and displacement). When holding a box without moving it, \( d = 0 \). So \( W=F\times0\times\cos\theta=0 \).

Answer:

Question 11: 10 watts
Question 12: False