# How much kinetic energy is need for a 5kg object to move from rest to 7m s?

**Contents**hide

## How much kinetic energy is need for a 5kg object to move from rest to 7m s?

The equation for kinetic energy is ½mv2, where m is your mass and v is your velocity. So for the given information, we have KE = ½(5 kg)(72) =122.5 Joules.

## How much net force is a 2 kg object moving horizontally with a speed of 4m s?

Answer and Explanation: Thus, if an object is moving with constant velocity and no external force, like a frictional force, then the object continues to move with the same velocity in the same direction. Hence the net force required is ZERO.

## What is the kinetic energy of a 10 kg object moving at 5 ms?

The kinetic energy of the object is 125 J.

## What is the kinetic energy of a 5kg ball dropped from a height of 10m?

Answer and Explanation: Thus, the kinetic energy just before the ball reaches the ground is 490.5 J. The velocity of the ball before it reaches the ground is 14.0 m/s.

## What is a mass of 10kg moves with a velocity of 4m?

An object of mass 10 kg is moving with a uniform velocity of 4 ms-1. The kinetic energy possessed by the object is 80 J.

## How much net force is required to keep a 5 kg object moving rightward with a constant velocity?

The amount of net force required to keep a 5-kg object moving rightward with a constant velocity of 2 m/s is ____. Net force is always m•a. In this case, the velocity is constant so the acceleration is zero and the net force is zero.

## When a force of 4 N acts on a mass of 2kg for a time of 2 sec What is the rate of change of momentum?

Data: Force= 4 N, Mass= 2 Kg, Time= 2 Sec. Rate of change of momentum is Force = ? V= F×s/m=4×2/2=8/2=4. F= m×v/s=2×4/2=8/2=4.

## Does velocity mean speed?

Why is it incorrect to use the terms speed and velocity interchangeably? The reason is simple. Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement.

## What is the kinetic energy of a 45 kg object moving at 13?

What is the kinetic energy of a 45 kg object moving at 13 m/sec? 3. Solving the equation gives a kinetic energy value of 3802.5 J. Note: The unit for energy is the same as for work: the Joule (J).

## How to calculate velocity?

Determine the object’s original velocity by dividing the time it took for the object to travel a given distance by the total distance. In the equation V = d/t, V is the velocity, d is the distance, and t is the time.

## What is the kinetic energy of a 5.0 kg object?

The kinetic energy of a 5.0 kg object is initially 35 J.

## How do you calculate the potential energy of a 5Kg object?

For 5Kg body : PE at 2m height above the ground is given by = 5×9.8×2=98J.

## How much energy does it take to move 1kg 1m?

A joule is the amount of energy needed to exert a force of one newton through one meter. For example, if you lift a one-kilogram weight one meter, then the energy you must expend is: E = Fd = (ma)d = mgd = (1 kg)(9.8m/s2)(1 m) = 9.8 kg m2/s2 = 9.8 joules.

## What is the kinetic energy of an object of mass 5 kg is dropped from a height of 10 m when it is halfway down?

Solution: An object of mass 5 kg is dropped from a height of 10 m. Its kinetic energy when it is halfway down is 245 J. ⇒ PE = 490 J.