Question

a hammer of mass 1 kg Falls freely on a nail placed on a piece of a words if it falls from a height of 1 metre how much kinetic energy it will have just before hitting the nail​

Answer 1

Kinetic energy of an object is the energy possessed by the object due to its state of motion.

The kinetic energy of an object can be calculated by the formula :

K = 1/2 × mass × velocity²

K = 1/2 m v²

Given info :

Mass of the hammer ( m ) = 1 kg .

Height from which it falls ( h ) = 1 m .

We know by the Laws of Motion :

v² = u² + 2 g h

Initial velocity of the hammer ( u ) = 0 m/s

Acceleration due to gravity ( g ) = 10 m/s²

v² = 0 + 2 × 10 m/s² × 1 m

⇒ v² = 20 m²/s² .

Now we know that :

K = 1/2 × m v²

⇒ K = 1/2 × 1 kg × 20 m²/s² [ Putting the values ]

⇒ K = 10 kg m²/s²

⇒ K = 10 J

The kinetic energy will be 10 J .

Answer 2

Answer:

The answer is 10 Joules