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Quiz 45
Mdcat-past-papers Quiz
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881. In projectile motion for which angle maximum height is half of its range?
73°
65°
63°
68°
882. The horizontal range of projectile will be maximum when?
sin θ = 1
sin 2θ = 1
sin θ = 0
sin 2θ = 0
883. Work done will be zero if angle between force and displacement is:
0°
60°
270°
360°
884. The work done in figure is:
24 Nm
16 Nm
8 Nm
Zero Nm
885. The rate at which work is being done is:
Density
Force
Energy
Power
886. Which of the following statement shows that no work is done?
Pushing a car to start it moving
Writing an essay on page
Lifting the weights
The moon orbiting the earth
887. The work done by a variable force can be found by dividing the:
Force into small intervals
Displacement into small intervals
Both force and displacement into small intervals
By taking displacement at different angles
888. Work done is equal to:
Effort × distance
Effort + distance
Effort − distance
Effort ÷ distance
889. When a force of 1N displaces its point of application by 1m in the direction of force, the work done is:
1 J
10 J
0 J
1 J
890. A body of mass 4kg is moving in a circle of radius 2m. If the body moves round a complete circle, what is the work done by the body?
16 J
Zero
16 J
6 J
891. The work done will be negative, if the angle between force and displacement is:
45°
Power / Time
60°
180°
892. The unit of kinetic energy is same as that of:
Work
Power / Time
Time / Power
Work / Time
893. The magnitude of work is half of maximum at angle:
30°
45°
60°
90°
894. Work done is negative when θ is:
0°
45°
90°
180°
895. A cyclist comes to a skidding stop in 10m. During this process, the opposing force on the cycle due to the road is 200N. How much work does the road on the cycle?
–1800 J
–2000 J
200 J
1900 J
896. How does an angle between the force applied and the direction of motion influence the work done on an object?
Work is constant regardless of the angle
Work is maximum when the angle is 0°
Work is negative when the angle is 90°
Work is 0 when the angle is 45°
897. A nurse is pushing a wheelchair with an 80 Kg patient sitting on it. How much work is done by the patient's weight?
Half of the work
Minimum work
Maximum work
No work
898. If a constant force of 10 N is applied to move an object 5m in the direction of the force, what is the work done?
2 J
15 J
5 J
50 J
899. The area under force-displacement graph gives:
Displacement
Work
Power
Acceleration
900. At what angle of applied force, work done will be 50%?
30°
60°
90°
45°
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