I think it’s B because we aren’t looking for Vf
The net torque on the seesaw is 294 Nm.
<h3>What is torque?</h3>
Torque is the force that tends to rotate the body to which it was applied.
To calculate the net torque, we use the formula below
Formula:
- τ = mgd-m'gd'........... Equation 1
Where:
- m = Jenny's mass
- m' = Tom's mass
- d = Jenny's distance from the pivot
- d' = Tom's distance from the pivot
- g = acceleration due to gravity
From the question,
Given:
- m = 40 kg
- m' = 30 kg
- d = 1.5 m
- d' = 1 m
- g = 9.8 m/s²
Substitute these values into equation 1
- τ = (40×1.5×9.8)-(30×1×9.8)
- τ = 588-294
- τ = 294 Nm
Hence, The net torque on the seesaw is 294 Nm.
Learn more about torque here: brainly.com/question/14839816
<span>D. Mass equals weight times acceleration due to gravity.
choose
</span>
The Kinetic Energy Formula is as follows: KE = mass x velocity^2 /2
Plug in the correct numbers into the variables!
KE = 1500 kg x 10 m/s ^2 / 2
Square the 10 m/s!
KE = 1500 kg x 100 m/s / 2
Multiply!
KE = 150,000 / 2
Divide!
KE = 75,000 Newton-meters or Joules!
When you touch a doorknob, all the charge wants to leave you and go to the doorknob. You see a spark and get a shock as the electrons leave you. Lightning is the result of static electricity.
