Question

An object of mass 15 kg is moving with a uniform velocity of 4 m s-¹.what is the kinetic energy possessed by the object?​

Answer 1

Answer:

120 J.

Step-by-step explanation:

Mass of the object , m = 15 kg , velocity of the object , v = 4 m s-¹.

From Eq.(11.5),

E k= 1

____ m v²

2

1

= _____ ×15 kg × 4 m s-¹× 4 m s-¹

2

= 120 J

The kinetic energy of the object is 120 J.

Answer 2

Answer :

Given -

• Mass = 15 kg
• Speed = 4 m/s

To Find -

• Kinetic energy ?

Solution -

Kinetic Energy = ½mv²

Now, Calculating Kinetic energy :

⇒ ½*15*(4)²

⇒ ½*15*16

⇒ 15*8

⇒ 120 J

Hence, Kinetic energy of the body = 120 J.

Some Additional Information -

• Energy possessed by a body due to change in position of shape is called potential energy.

• Energy possessed by a body due to change in motion is called Kinetic energy.

• PE = mgh

• KE = ½mv²