Recent questions in 9th

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Why is the work done on an object moving with uniform circular motion zero?

asked Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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If an object has 0 momentum, does it have kinetic energy? Explain your answer.

asked Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Determine the amount of work done when an object is displaced at an angle of 30o with respect to the direction of t

asked Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Prove that the kinetic energy of a freely falling object on reaching the ground is nothing but the transformation

asked Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Derive the formula for the kinetic energy of an object of mass m, moving with velocity v.

asked Apr 3, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Explain the difference between potential energy and kinetic energy.

asked Apr 3, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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1 answer 425 views

Does the angle of banking depend on the mass of the vehicle?

asked Mar 26, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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A person swims 100 m in the first 40 s, 80 m in the next 40 s and 45 m in the last 20 s. What is the average speed?

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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A bullet having a mass of 10 g and moving with a speed of 1.5 m/s, penetrates a thick wooden plank of mass 90 g.

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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An object of mass 16 kg is moving with an acceleration of 3 m/s2 . Calculate the applied force.

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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1 answer 803 views

An object moves 18 m in the first 3 s, 22 m in the next 3 s and 14 m in the last 3 s. What is its average speed?

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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Take 5 examples from your surroundings and give explanation based on Newtons laws of motion.

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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1 answer 369 views

Give scientific reasons. d. The velocity of an object at rest is considered to be uniform.

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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1 answer 813 views

Give scientific reasons. c. It is easier to stop a tennis ball as compared to a cricket ball, when both are travelling

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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1 answer 347 views

Give scientific reasons. b. Even though the magnitudes of action force and reaction force are equal and their

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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1 answer 489 views

Give scientific reasons. a. When an object falls freely to the ground, its acceleration is uniform.

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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1 answer 468 views

Complete the sentences and explain them. Laws of motion

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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1 answer 455 views

Complete the following table. u (m/s) a (m/s2) t (sec) v = u + at (m/s) 2

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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1 answer 423 views

Clarify the differences Uniform and non-uniform motion.

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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1 answer 395 views

Clarify the differences Distance and displacement

asked Mar 17, 2022 in Chapter 1 Laws of Motion by Doubtly (98.9k points)

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