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What is the height of an object of mass 4 kg which touches the ground after 5s?

Explanation: If you are close to the Earth but not that close, the speed after 5 s. is v=gt or v=9.8m/s/s * 5 s = 49 m/s. Since KE= (1/2)m(v**2) you get (1/2)(49**2)(4kg) in joules.

How fast will it fall to the ground if an object is dropped from a height of 100 m?

its velocity at the moment it touches the ground its answer is : 140 m/sec​

When a body is dropped from a certain height on the ground the work is done on the body and is?

The amount of work done by the force of gravity on the object is zero.

What is the work done by a boy of mass 50 kg running in a circular path of radius 30m?

Answer. The work done is zero. This is because the gravitational force and displacement are perpendicular to each other.

How do you calculate free falling objects?

The formula for free fall: Imagine an object body is falling freely for time t seconds, with final velocity v, from a height h, due to gravity g. It will follow the following equations of motion as: h= \frac{1}{2}gt^2. v²= 2gh.

How do you calculate weight with height and mass?

Summary

1. Weight is a measure of the force of gravity pulling down on an object. It depends on the object’s mass and the acceleration due to gravity, which is 9.8 m/s2 on Earth.
2. The formula for calculating weight is F = m × 9.8 m/s2, where F is the object’s weight in Newtons (N) and m is the object’s mass in kilograms.

How is freefall time calculated?

Choose how long the object is falling. In this example, we will use the time of 8 seconds. Calculate the final free fall speed (just before hitting the ground) with the formula v = v₀ + gt = 0 + 9.80665 * 8 = 78.45 m/s . Find the free fall distance using the equation s = (1/2)gt² = 0.5 * 9.80665 * 8² = 313.8 m .

How many kg is dropped from a height of 4m?

An object of mass 20 kg is dropped from a height of 4 m. Fill in the blanks in the following table by computing the potential energy and kinetic energy in each case. Take g = 10 m/s 2

What is the velocity when dropped from a height of 100m?

If a mass of 4 kg is dropped from a height of 100 meters, what is its velocity when it touches the ground? The velocity of an object freely falling depends only on height of fall and the acceleration due to gravity ( although we consider it constant but it is not). It is independent of the mass of the object. v = 44.29 m/s.

How high does a 1kg ball hit the ground?

A ball of mass 1kg dropped from 9.8m height strikes the ground and rebounds to a height of 4.9m . If the time of contact between ball and ground is 0.1s , then find impulse and average force acting on ball. A ball of mass 1kg dropped from 9.8m height strikes the ground and rebounds to a height of 4.9m.

What is the final velocity when a falling object touches the ground?

So, final velocity when it touches the ground will be 44.27m/s. 8 clever moves when you have $1,000 in the bank. We’ve put together a list of 8 money apps to get you on the path towards a bright financial future. Since acceleration due to gravity is independent of mass of the body, it will not affect the velocity of the falling object.