Recent content by mememe1245

Homework Statement A torque acts on a wheel rotating at 19.8 rad/s and increases its angular speed to 23.5 rad/s in 11.2 s. Find the angle through which the wheel turns during this time. Homework Equations omega = theta/time The Attempt at a Solution 23.5 - 19.8/11.2 = .33rad/s/s --- this is...

Nm

Ohhh...Okay. so, 18 x 0.0420kg P = .756N?

Why is the "6" negative?

Question A 0.0420-kg hollow racquetball with an initial speed of 12.0 m/s collides with a backboard. It rebounds with a speed of 6.0 m/s. a. Calculate the total impulse on the ball. b. If the contact time lasts for 0.040 s, calculate the average force on the ball. What I did on the test...

This is NOT my home work...just curious. Why would a person, even one that isn't interested in "buffing" up want to maintain good muscle tone?

Sorry...can I have more help with just two more questions? Please.

Ohhh...Waw! Thank u!

Okay, I understand that mu = .2 and g= 2000N. What I don't understand is how to solve the problem.

so, mu=force of friction/ force of Newton, right?

Okay...

G= 200kg * 9.8m/s^2 = 1960N?

200 kg

I did attempt the problem, but I' now more confused than ever. Please help me. Joe is moving his refrigerator to take to college and he begins by pushing it across the wooden kitchen floor. On a flat surface like the floor, how do you calculate how hard he needs to push? Draw a free body...