+0

# science

+5
901
1

A tired squirrel (mass of 1 kg) does push-ups by applying a force to elevate its center-of-mass by 5 cm. Estimate the number of push-ups that a tired squirrel must do in order to do a approximately 5.0 Joules of work.

physics
Nov 20, 2015

#1
+3630
+5

A tired squirrel (mass of 1 kg) does push-ups by applying a force to elevate its center-of-mass by 5 cm. Estimate the number of push-ups that a tired squirrel must do in order to do a approximately 5.0 Joules of work.

\(W_{pushup}=F_{pushup} d \\ F_{pushup} = m g = (1kg)(9.8m/s^2) = 9.8N\\ W_{pushup}=(9.8N)(0.05m) = 0.49Joules\)

\(\dfrac {5}{0.49} \approx 10.2 \\ \mbox{So }10 \mbox{ pushups is about }5 \mbox{ Joules of work.}\)

.
Nov 20, 2015

#1
+3630
+5

A tired squirrel (mass of 1 kg) does push-ups by applying a force to elevate its center-of-mass by 5 cm. Estimate the number of push-ups that a tired squirrel must do in order to do a approximately 5.0 Joules of work.

\(W_{pushup}=F_{pushup} d \\ F_{pushup} = m g = (1kg)(9.8m/s^2) = 9.8N\\ W_{pushup}=(9.8N)(0.05m) = 0.49Joules\)

\(\dfrac {5}{0.49} \approx 10.2 \\ \mbox{So }10 \mbox{ pushups is about }5 \mbox{ Joules of work.}\)

Rom Nov 20, 2015