# Physics Formal Assessment Lab5 Under Mr Tan

10 Questions | Total Attempts: 46

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This exam is about torques and law of moments. There are ten items in this quiz

• 1.
In a seesaw, torque is NOT affected by
• A.

Force applied

• B.

Distance from the fulcrum

• C.

Time spent on the seesaw

• D.

Weight

• E.

Acceleration due to gravity

• 2.
The ability of a force to cause rotation
• A.

Acceleration

• B.

Law of moments

• C.

Torque

• D.

Both b and c

• E.

None of the above

• 3.
Roger, who has a mass of 55.0 kg, is sitting on the edge on the left side of a 4.00 m seesaw with the fulcrum found in the middle. Where should John sit on the right side if he has a mass of 75.0 kg?
• A.

2.9 m from the fulcrum

• B.

3.5 m from the fulcrum

• C.

1.5 m from the fulcrum

• D.

1.6 m from the fulcrum

• E.

0.4 m from the fulcrum

• 4.
The sum of clockwise torque should be equal to the sum of the counterclockwise torque. This is known as the
• A.

1st condition of equilibrium

• B.

2nd condition of equilibrium

• C.

3rd condition of equilibrium

• D.

4th condition of equilibrium

• E.

5th condition of equilibrium

• 5.
A 2.0 kg board serves as a seesaw for two children. One child has a mass of 30 kg and sits 2.5 m from the pivot point. At what distance from the pivot must a 25 kg child place herself to balance the seesaw?
• A.

1m

• B.

2m

• C.

3m

• D.

4m

• E.

5m

• 6.
What is the torque (in Nm) applied by a 686 N person about the front support of a diving board, 3.0 m from the support.
• A.

1477

• B.

4500

• C.

2100

• D.

2500

• E.

2058

• 7.
A 15 N box and a 25 N child sit at opposite ends of a 4.0 m seesaw pivoted at its center. Where should a third box whose weight is 20 N sit in order to balance the seesaw?
• A.

2m from the 15 N box

• B.

1 m from the 25 N box

• C.

1.5 m from the 25 N box

• D.

0.55 from the 15 N box

• E.

None of the above

• 8.
Noynoy and Manny are on a see-saw. Noynoy is 73kg and is 2.3m away from the center of the see-saw. Lily is 3.1m away. The see-saw is balanced. What is Manny's mass?
• A.

4.52 kg

• B.

4.52 N

• C.

73.4 kg

• D.

84.11 kg

• E.

53.4 kg

• 9.
What is the torque (in Nm) applied by 60.0 kg person 5 meters from the fulcrum?
• A.

1780

• B.

2940

• C.

3522

• D.

6197

• E.

4558

• 10.
What is the torque (in Nm) applied by 100 N person 10.0 meters from the fulcrum?
• A.

500

• B.

1000

• C.

1500

• D.

2000

• E.

10000

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