# science

posted by .

an object moving at a speed of 1m/s has a kinetic energy of 5 J what is its kinetic energy when it moves at 3m/s

• science -

Hi dear, KE = 1/2 mv^2. Hope you'll be able to do it now.

• science -

5 J = 1/2 *m*1, solving this, mass of the body is 10kg. Now, KE = 1/2 mv^2 implies 1/2 * 10 * 3^2 = 45 J

## Similar Questions

2. ### physics

If there is just one force acting on an object, does its work necessarily result in an increase in kinetic energy?
3. ### physics

If there is just one force acting on an object, does its work necessarily result in an increase in kinetic energy?
4. ### chemistry

An electron is accelerated through an electric potential to a kinetic energy of 18.2 keV. What is its characteristic wavelength?

1. The thermal energy of an object is _____. (1 point) its potential energy its average kinetic energy its potential energy minus its kinetic energy its kinetic energy plus its potential energy Thanks, jessica :)
6. ### Physical Science-Can someone check my answers?

1) The kinetic energy of an object depends on which of the following?