Question

Which has the greatest potential energy, a mouse on a ladder or an elephant on the ground?

A.Mouse has the greater PE

B.Neither they are equal

C.Elephant has the greater PE

2.A large bug with a mass of 0.008 kg is on a turntable. It is 0.15 m away from the center. The coefficient of friction between the bug and the turntable surface is 0.35. The turntable starts from rest and speeds up for 5 s until the bug loses his grip. At what angular speed does the bug lose his grip?

A.0.72 rad/s

B. 8 rad/s

C.2.8 rad/s

D.1.5 rad/s

3.An airplane propeller with a 4 m radius is spinning at rate of 1000 rpm. Which of the following is true?

A.All points along the length of the propeller blade have the same angular velocity.

B.The tangential speed decreases as you move away from the center of rotation to the end of the propeller.

C.All points along the length of the propeller have the same tangential velocity.

D.The angular velocity increases as you move from the center of rotation to the end of the propeller.

Answer 1

0 answer in ® Meither they are equal. Because height height = 0. 2 At the moment the bug loses its grip. Fc = ghrw² = fman ung ug 0-35 x 9,81 a wz: = こ r oots w = 4.78435 nad/s WE w=4.78 radio The bug lones its grip at angular speed of 4.78 roolis. 3 Answer - All points along the length of the propeller blade have the same angular velocity,