Today test

Name the physical quantity which is equal to the product of force and velocity.

• Work

• Energy

• Acceleration

• Power

Work done will be maximum if the angle between the force F and displacement d is

• 90 degree

• 180degree

• 0degree

• 270degee

When a force is parallel to the direction of motion of the body, then work done on the body is

• Maximum

• Minimum

• Half of maximum

• None

If a body a mass of 2 kg is raised vertically through 2m, then the work done will be

• 38.2J

• 392.1J

• 39.2J

• 50J

 The average power and instantaneous power become equal if work is done at

• Uniform rate

• Variable rate

• any rate

• High rate

Slope of work time graph is equal to

• Displacement

• Velocity

• Acceleration

• Power

Work done by the force of friction is

• Positive

• Negative

• Neutral

• All

Which of the following is not conservative force

• Friction

• Gravitational

• Electrical

• All

• Magnetic

The consumption of energy by a 60 watt bulb in 2 sec is

• 120J

• 30J

• 60J

• 0.02

 The dot product of force and velocity is

• Velocity

• Acceleration

• Power

• Speed