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Hassan
1. According to newton's 2nd law of motion, with mass ‘m’, velocity ‘v’ and radius ‘r’ the centripetal force is equal to
A. mv² ×r
B. (mv²)⁄r
C. mv² + r
D. mv² ×r
2. Which of the following material lowers friction when we pushed between metal plates
A. water
B. air
C. oil
D. water
3.The acceleration produced by a force of 120 N in a mass of 35 kg will be
A. 4 ms−2
B. 3.43 ms−2
C. 5.21 ms−2
D. 4 ms−2
4. Mass is measured by a
A. beam balance
B. screw gauge
C. physical balance
D. beam balance
5.A body continues its state of rest or of uniform motion in a straight line provided no net force acts on it, this statement is called
A. newton's 2nd law of motion
B. newton's 1st law of motion
C. newton's 3rd law of motion
D. newton's 2nd law of motion
6. The force which produces acceleration in the body is equal to the rate of change of
A. velocity
B. acceleration
C. density
D. velocity
7.The force with which the earth attracts the bodies towards its center is called
A. mass
B. inertia
C. gravitational force
D. mass
8.The friction offers by a slippery ground is
A. very high
B. very little
C. very difficult
D. very high
9.In dryer, the water is pushed out of wet clothes due to
A. abundance of centripetal force
B. lack of centripetal force
C. friction
D. abundance of centripetal force
10. The force that opposes the motion of moving objects is called
A. friction
B. velocity
C. inertia
D. friction
11. If a bus takes a sharp turn then passengers inside move outward due to
A. force
B. inertia
C. normal force
D. force
12. The perpendicular distance between the axis of rotation and the line of action of the force is called the
A. moment arm
B. inertia
C. velocity
D. moment arm
13. A nut has been tightened by a force of 180 N using an 8 cm long spanner. What length of a spanner is required to loosen the same nut with 150 N force
A. 11 cm
B. 8.5 cm
C. 9.6 cm
D. 11 cm
14.A force of 120 N is applied perpendicularly on a spanner at a distance of 9 cm from a nut. The torque produced by the force will be
A. 12 Nm
B. 10.8 Nm
C. 15 Nm
D. 12 Nm
15.The forces that are parallel to each other and have the same direction are called
A. positive forces
B. negative forces
C. unlike parallel forces
D. positive forces
16.An object tied with string and is hung vertically is an example of
A. parallel forces
B. unlike parallel forces
C. like parallel forces
D. parallel forces
17.If no net force is applied on a body, then it is said to be in
A. distance
B. equilibrium
C. linear motion
D. distance
18. In the graphical method for the addition of forces, forces are added by
A. Cramer rule
B. head to tail rule
C. to and fro rule
D. Cramer rule
19.The torque depends upon
A. force only
B. moment arm only
C. mass
D. force only
20. Using trigonometric ratios, for a right angle triangle tanθ is equal to
A. Perpendicular ⁄ Hypotenuse
B. Base ⁄ Hypotenuse
C. Hypotenuse ⁄ Base
D. Perpendicular ⁄ Hypotenuse
21.If after a slight tilt the body returns to its previous equilibrium, then it is said to be in
A. zero equilibrium
B. stable equilibrium
C. unstable equilibrium
D. zero equilibrium
22.A force of 10 N is making an angle of 30 ° with the horizontal. Its horizontal component will be
A. 4 N
B. 5 N
C. 7 N
D. 4 N
23.Racing cars are made stable by
A. decreasing their mass
B. increasing their speed
C. lowering their center of gravity
D. decreasing their mass
24. If the net force acting on the body is zero then the body is said to be
A. imbalanced
B. balanced
C. in equilibrium
D. imbalanced
25.The total torque produced in opening a nut from spanner is
A. F * AB
B. F * A
C. F * B
D. F * AB
26. The weight of 10apples in a bag is an example of
A. like parallel forces
B. unlike parallel forces
C. force of tension
D. like parallel forces
27.Along which a force act is called
A. line of action of force
B. line of acting torque
C. axis of rotation
D. line of action of force
28.The splitting of vectors into two components is called
A. addition of vectors
B. division of vectors
C. resolution of vectors
D. addition of vectors
29.If 150N of farce is applied on a spanner of 10 cm to open a nut then the length of spanner when the force applied on it is 60 N is
A. 25 cm
B. 80 cm
C. 40 cm
D. 25 cm
30. If after a slight tilt the body does not return to its previous equilibrium, then it is said to be in
A. unstable equilibrium
B. stable equilibrium
C. zero equilibrium
D. unstable equilibrium
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