The work done to hold a weight of 20 kg at a height of 1 m above the ground is zero Joules. When an object is held stationary, there is no displacement, so no work is done against gravity.
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An astronaut can jump higher on the lunar surface than on the Earth’s surface because the force of gravity on the lunar surface is very less as compared to the Earth’s surface. This weaker gravity allows the astronaut to exert ...
Body weight varies with location on Earth’s surface due to differences in gravitational acceleration. It is maximum at the poles due to being closer to the Earth’s center, and minimum at the equator due to the centrifugal force caused by ...
As we move from the equator towards the poles, the value of g decreases. This is because the centrifugal force due to Earth’s rotation is greatest at the equator, causing a slight outward push that counteracts some of the gravitational ...
When a person lands on the Moon, there is a change in weight. Weight is the force exerted on an object due to gravity, and since the Moon has less gravity than Earth, the person’s weight decreases. However, their mass ...
Force is the product of mass and acceleration. It is described by Newton’s second law, F = ma, where F represents force, m is mass, and a is acceleration. This relationship states that the force acting on an object is ...
A cricket player catches a fast-moving ball by pulling his hand back because it may require applying less force. This technique allows for better control, reduces the impact force, and minimizes the chance of injury or the ball bouncing off ...
A person trapped in a swamp is advised to lie down because as the area increases, the pressure decreases. Distributing the weight over a larger surface area reduces the pressure exerted on the swamp’s surface, making it less likely to ...
A heavy iceberg melts at the bottom rather than the top because the melting point decreases due to the pressure of the lower layer being higher. The increased pressure lowers the melting point, causing ice to melt more readily at ...
The ball keeps dancing in the water spray at intersections because due to higher velocity of water, pressure becomes higher. The increased velocity of water results in higher pressure, creating a force that propels the ball and causes it to ...