Question

3. The n object of
mass, m moving with a velocity
of 5 ms' is 25 Jkinetic energy of a. What will be its
kinetic energy when its velocity
is doubled? What will be its
kinetic energy when its velocity
is increased three times?
​

Answer 1

Answer:

Given, velocityofobject,v=5ms

−1

;

kineticenergyofanobject,E

K

=25J

E

K

=

2

1

mv

2

or 25=

2

1

×m×(5)

2

or m=

25

50

=2kg

When the velocity triples,

E

K

=

2

1

mv

2

=

2

1

×2×(15)

2

=225J