Two solid cylinderical disks have equal radii. The first disk is spinning clockwise at and the second disk is spinning counterclockwise at . The second disk has a mass three times larger than the first. If both spinning disks are combined to form one disk, they end up rotating at the same angular velocity and same direction. Find this angular velocity after combination.

Two solid cylinderical disks have equal radii. The first disk is spinning clockwise at and the second disk is spinning counterclockwise at . The second disk has a mass three times larger than the first. If both spinning disks are combined to form one disk, they end up rotating at the same angular velocity and same direction. Find this angular velocity after combination.

A mechanic is using a wrench to loosen and tighten screws on an engine block and wants to increase the amount of torque he puts on the screws to adjust them more easily. Which of the following steps will not help him to do so?

A mechanic is using a wrench to loosen and tighten screws on an engine block and wants to increase the amount of torque he puts on the screws to adjust them more easily. Which of the following steps will not help him to do so?

A gymnast is practicing her balances on a long narrow plank supported at both ends. Her mass is . The long plank has a mass of .

Calculate the force the right support provides upward if she stands from the right end. Use gravity .

Two children sit on the opposite sides of a seasaw at a playground, doing so in a way that causes the seasaw to balance perfectly horizontal. The child on the left is from the pivot.

What is the mass of the second child if she sits from the pivot?

A gymnast is practicing her balances on a long narrow plank supported at both ends. Her mass is . The long plank has a mass of .

Calculate the force the right support provides upward if she stands from the right end. Use gravity .

A mouse sits at the edge of a diameter record, rotating on a turntable at fifteen revolutions per minute. If the mouse walks straight inwards to a point from the center, what will be its new angular velocity? Assume the mass of the record is negligible.

Two children sit on the opposite sides of a seasaw at a playground, doing so in a way that causes the seasaw to balance perfectly horizontal. The child on the left is from the pivot.

What is the mass of the second child if she sits from the pivot?

A mouse sits at the edge of a diameter record, rotating on a turntable at fifteen revolutions per minute. If the mouse walks straight inwards to a point from the center, what will be its new angular velocity? Assume the mass of the record is negligible.