- #1

nickyfernandezzz

- 18

- 2

Member advised to use the homework template for posts in the homework sections of PF.

Hey guys, I need help with the following question.

A lead ball of specific heat capacity 130J/KgK travels with a speed of 100m/s before it hits a wooden cube fixed to floor and gets stuck inside.What will be the rise in temperature of this lead ball by the time it comes to

I attempted the question as follows,

Kinetic energy Thermal energy of

Of the lead ball = the lead ball after hitting

Before hitting the cube on the cube.

1/2×m×v^2 = mc(t1-t2)

1/2 × m×100^2 = m× 130×(t1-t2)

t1-t2 = 38 Celsius.

But apparently the answer I was given is 3 Celsius.

Can someone please tell me where I went wrong and how to answer the question correctly?

Thanks.

A lead ball of specific heat capacity 130J/KgK travels with a speed of 100m/s before it hits a wooden cube fixed to floor and gets stuck inside.What will be the rise in temperature of this lead ball by the time it comes to

I attempted the question as follows,

Kinetic energy Thermal energy of

Of the lead ball = the lead ball after hitting

Before hitting the cube on the cube.

1/2×m×v^2 = mc(t1-t2)

1/2 × m×100^2 = m× 130×(t1-t2)

t1-t2 = 38 Celsius.

But apparently the answer I was given is 3 Celsius.

Can someone please tell me where I went wrong and how to answer the question correctly?

Thanks.