Why does a man not feel weight while sitting inside a freely falling lift?
Free-fall is a motion of a body where gravity is the only acceleration acting upon it. A ...
Q: When an automobile moves for a long time, the air pressure in tyres increases slightly. Why?
A: When we drive, the frictional force between the tires and the road increases the temperature of the ...
Q: Water flows faster than honey. Why?
A: Water flows faster than honey because
Q: A body of 100g is taken to the centre of the Earth. What will be its mass there?
A: The mass of a body is the amount of matter contained in it. The rest mass of a body is constant unle...
Q: What is the angle preferred by athletes in throw?
A: Click to see the answer
Q: A parachute descends slowly. Why?
A: When any object falls from a height, gravity acts on it, which pulled it downwards, but the air resi...
Q: Define Poisson's ratio?
A: Poisson ratio is,
Q: How does a hologram differ from a conventional photograph?
A: A hologram differs from a conventional photograph in the following ways:
Q: What would be the weight of a body inside the Earth if it were a hollow sphere?
A: Weight of the body inside the earth would be zero. It is so because, weight of a body exist due to t...
Q: What are antifriction metals? Give some examples?
A: For machine parts likes bearings, bushings certain materials which acts with sliding friction and wi...