Common questions

Does a ball take longer to go up or come down?

Does a ball take longer to go up or come down?

The answer is: Down. Only if there was no air resistance would the up and down times be the same.

Why is time of ascent less than time of descent?

Due to this time of ascent is less than time of descent as object comes to rest in lesser time due to high resistance offered by gravity and air resistance.

When the body is thrown vertically upward then the speed due to gravity?

An object that is thrown vertically upwards decelerates under the earth’s gravity. Its speed decreases until it attains a maximum height, where the velocity is zero.

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Why did the ball take the same time to travel up and come down?

If there is air friction on the way up, then the force of friction pushes in the SAME downward direction that gravity pushes; however, on the way down, the force of friction is pushing upward, while the force of gravity pushes downward, so it will take LONGER for the object to fall.

Why does a ball moving upwards slow down and fall back?

It is affected by the throw (which gives the initial upward velocity) and gravity which applies a constant negative acceleration. The ball travels upward for 3 seconds, slowing down because of gravity until it reaches a stop and will begin falling.

Why is time of descent more than time of ascent?

Time of ascent is more than the time of descent. Ascent is resisted by gravity, so more force is required to overcome the gravity. This reduces the amount of energy available to impart velocity to the body. So body velocity reduces, which means increased time of travel.

Why is time of descent greater than time of ascent?

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But during descent the resistance acts upward and gravity acts downward so total acceleration is a=g−R/m. Now it is clear that during descent acceleration is less and we know that acceleration is inversely proportional to time because a=v/t. So time of descent is always greater than time of ascent.

When a ball is thrown vertically upwards its velocity keeps on decreasing what happens to its kinetic energy when it reaches the maximum height?

The kinetic energy becomes zero. According to the law of conservation of energy the kinetic energy is converted into potential energy. Potential energy is maximum at this height. When a ball is thrown vertically upwards, its velocity goes on decreasing.

When a ball is thrown vertically upwards with a velocity v not the total time taken to return to the point of projection is?

(2) The total time ball takes to return to the surface of the earth = 5 + 5 = 10 sec.

What is the final velocity of a body thrown vertically upward?

The body that is thrown vertically upward with velocity uwill have final velocity  v=0at  the greatest height h. Substituting the given values in the third equation of motion, v2=u2+2as we have 0=u2−2gh. (taking gin the upward direction)

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What is the difference between horizontal velocity and vertical velocity?

The horizontal velocity is constant, but the vertical velocity goes as … ie. the acceleration is always pointing downwards, even though some of the time () the velocity is upwards. This fits with Newton’s second law, because the acceleration is always in the direction of the force, and the force of gravity always points downwards.

Why does an object take longer to fall down when thrown upwards?

Thus, an object will take longer to fall down when thrown upwards considering resistance from the air. The Rock reveals the key to success for normal people. The big companies don’t want you to know his secrets.

What is the air resistance at the highest point of a body?

At the highest point, velocity is zero. Hence air resistance which depends on velocity of the body will be zero. As the body is immersed in air buoyant forces acts on the body opposing gravity. So acceleration of the body will be less than that due to gravity (The standard 9.8/ms^-2 is for near surface projections).