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BidishaKashayap1333
@bidishakashayap1333
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Joined: Oct 11, 2021
Last seen: Jul 27, 2023
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Topics: 2174 / Replies: 0
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Topic
There are two types of forces X and Y. The forces belonging to type X can produce motion in a stationary object but cannot change the shape of the object.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 300
Topic
A car is moving on a level road. If the driver turns off the engine of the car, the car’s speed decreases gradually and ultimately it comes to a stop.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 268
Topic
A man throws a ball weighing 500 g vertically upwards with a speed of 10 m/s. (i) What will be its initial momentum? (ii) What would be its momentum at the highest point of its flight?
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 102
Topic
A moving bicycle comes to rest after sometime if we stop pedalling it. But Newton’s first law of motion says that a moving body should continue to move for ever, unless some external force acts on it. How do you explain the bicycle case?
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 248
Topic
A plastic ball and a clay ball of equal masses, travelling in the same direction with equal speeds, strike against a vertical wall. From which ball does the wall receive a greater amount of momentum?
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 240
Topic
What happens to the passengers travelling in a bus when the bus takes a sharp turn? Give reasons for your answer. (b) Why are road accidents at high speeds very much worse than road accidents at low speeds?
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 298
Topic
What do you understand by the terms “balanced forces” and “unbalanced forces”? Explain with examples. (b) What type of forces - balanced or unbalanced - act on a rubber ball when we press it between our hands?
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 101
Topic
Give one example each where: (a) a force moves a stationary body. (b) a force stops a moving body.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 117
Topic
(a) Define the term ‘force’. (b) State the various effects of force.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 93
Topic
Define momentum of a body. On what factors does the momentum of a body depend? (b) Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 98
Topic
What is the momentum in kg.m/s of a 10 kg car travelling at (a) 5 m/s (b) 20 cm/s, and (c) 36 km/h?
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 270
Topic
Explain why, it is dangerous to jump out of a moving bus.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 277
Topic
When a tree is shaken, its fruits and leaves fall down. Why?
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 199
Topic
Give reason for the following: When a hanging carpet is beaten with a stick, the dust particles start coming out of it.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 268
Topic
Explain why, a person travelling in a bus falls forward when the bus stops suddenly.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 284
Topic
Why do the passengers in a bus tend to fall backward when it starts suddenly?
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 174
Topic
On what factor does the inertia of a body depend? Which has more inertia, a cricket ball or a rubber ball of the same size?
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 220
Topic
State Newton’s first law of motion. Give two examples to illustrate Newton’s first law of motion.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 115
Topic
Describe the term ‘inertia’ with respect to motion.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 82
Topic
Which of the two, balanced forces or unbalanced forces, can change the shape of an object? Give an example to illustrate your answer.
4 years ago
Forum
Force and Laws of Motion
Replies: 0
Views: 123
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