Lever

Q.

A lever works on the principle of _____

1. moments

2. velocity

3. acceleration

4. speed

Q.

Observe the given figure and calculate the resistance (R) offered by the nut when the effort of 45 N is applied.

1. 140 N

2. 135 N

3. 120 N

4. 160 N

Q. How does a rubber sucker stick to the wall?​

Q.

The fixed point about which the lever turns in called ____

1. Effort

2. Load

3. Mass

4. Fulcrum

Q.

A force of 5 kgf is required to cut a metal sheet. A shear is used for cutting a metal sheet; its blade is 5 cm long while its handle is 10 cm long. What effort is needed to cut a sheet?

1. 5.0 kgf

2. 2.5 kgf

3. 2.0 kgf

4. 3.0 kgf

Q. Consider three identical spring balances hooked as shown in the figure. If the reading shown in spring balances A, B and C are F_A, F_B and F_C respectively. Then choose the correct relation.

चित्र में दर्शाए अनुसार संयोजित एक जैसी तीन स्प्रिंग तुलाओं पर विचार कीजिए। यदि स्प्रिंग तुलाओं A, B व C में दर्शाए गए पाठ्यांक क्रमशः F_A, F_B व F_C हैं। तब सही सम्बन्ध का चयन कीजिए।

1. F_A > F_B > F_C
   
2. F_A = F_C > F_B
   
3. F_A < F_B > F_C
   
4. F_A = F_B = F_C
   

Q.

In a Roman steelyard, the length of the scale is 1.5 m and the weight of the rider is 20 N. The load is suspended 15 cm away from the point of suspension, then the maximum load that can be measured by it is _________. (Take g = 10 m s^-2)

1. 20 kg wt

2. 20 N

3. 2 N

4. 2 kg wt

Q. If we know the magnitude of force and mass of the object, we can determine________ of the object.

1. position
2. work done
3. speed
4. acceleration

Q. Which of the following statements is correct regarding drag acting on a ball thrown vertically downwards from a building before it touches the ground?

1. 
   The ball will experience no drag.
2. 
   The direction of the drag will always be upward.
3. 
   The direction of the drag will always be downward.
4. Initially, the direction of drag will be upward and after some time the direction will be downwards.
   

Q. When a fruit falls from a tree, what is the nature of the force that the fruit exerts on the Earth?

1. Less than its weight
2. Not equal to its weight
3. Equal to its weight and in the same direction.
4. Equal to its weight and opposite in direction.

Q. Two masses $4\text{g}$ and $12\text{g}$, are placed horizontally at a distance of $12\text{cm}$ from each other. Another mass of $0.5\text{g}$ is placed in between them such that there is no net force acting on it. Find the distance (in $\text{cm}$) of the third mass from the mass of $4\text{g}$.

1. $+6+6\sqrt{3}\text{cm}$
2. $+6-6\sqrt{3}\text{cm}$
3. $-6+6\sqrt{3}\text{cm}$
4. $6\sqrt{3}\text{cm}$

Q. Can there be newton in minus ?If so them what is the net force when -5N and -10N nare acting on opposite sides of a object.

Q. If we know the magnitude of force and mass of the object, we can determine________ of the object.

1. work done
2. acceleration
3. speed
4. position

Q. Animals make use of force to carry out physical tasks.

1. gravitational
2. muscular
3. magnetic