Moments and Levers - WS - L15 - PHY

With a gear, the output speed can be reduced while the torque is ________.

• increased

• decreased

• remains steady

• returns to zero

Is the lever balanced? If not, how would it move?

• Yes

• No, tips to the left

• No, tips to the right

• No, tips sideways

Find the missing force on the displayed balanced lever.

• 3N

• 45N

• 12N

• 5N

What is the direction of motion of this lever?

• Clockwise

• Anticlockwise

• Right

• Backward

A uniform rod AB has length 1.5 m and mass 8 kg. A particle of mass m kg is attached to the rod at B. The rod is supported at the point C, where AC = 0.9 m, and the system is in equilibrium with AB horizontal, as shown in the diagram. What is the mass m?

• 2kg

• 14.4N

• 1kg

• 6kg

Gears can be used to (a)   the direction of rotation.

• reverse

• stop

• slightly change

• repeat

True or False: Gears increase the speed of rotation.

• True

• False

What is the moment of this force?

• 3Nm

• 4.5Nm

• 7.5Nm

• 1.5Nm