Question

B. FILL IN THE BLANKS
1. When a force is applied at the axis of rotation the torque produced is ___________.
2. The torque produced by a long arm is _________ than a short arm spanner.
3. Torque is a vector quantity.
4. Centre of gravity of an irregular shaped thin lamina can be found by using _________.
5. A body in equilibrium remains at ______ or moves with ____________.
6. A self-righting toy maintains its position because of its ________ base.
7. A picture frame is hanging by two vertical strings. The tensions in the strings are 3.8 N and 4.4 N. the weight of the picture frame is __________.
8. The formula to find the direction of the force from its perpendicular components is ___.
9. A fan rotating with constant speed is in _____________.
10. A block of mass 10 kg is hanging through a cord. The tension in the cord____________.

C. TRUE AND FALSE
1. To tighten the nut, spanner is turned anticlockwise. T / F
2. In stable equilibrium, the body comes back to its original position. T / F
3. The center of mass is always towards the heavier side of the body. T / F
4. The horizontal components of a force of 50 N making an angle of 30° with
X-axis is 25N. T / F
5. In unstable equilibrium the center of gravity stays in the same position in
new state. T / F

Answer 1

Explanation:

1.zero

2. more

3. torque is a tensor quantity not vector quantity

4. integration to find centre if mass

5. equilibrium, constant velocity

6. heavy base

7. 8.2 N

8. √(F1^2 + F2^2)

9. equilibrium

10. 980 N

1. false.

2. true

3. true.

4. false it is 25 root 3

5. false it moves...