A 4kg ball moving with a velocity of 10 m/s collides with a 16kg ball moving with a velocity of 4m/s in opposite direction. Show that kinetic energy is not conserved
Answers
Answer:
Mrs. Sharma often spends too much money on clothes.
She does not need new clothes, but she loves buying them. Yesterday she saw a beautiful coat in a shop window. She went in and put it on. It was just the right size, but it was dear. Mrs. Sharma did not have enough money, but she took the coat home and showed it to her husband. He liked it very much, but he did not like the price. His wife gave him a bill for Rs. 5000!
What kind of woman did you find Mrs. Sharma to be?
How many sentences are there in the entire text? Are there any Negative Sentences?
Do Mr. and Mrs. Sharma have any children? How did you know?
If ‘dear’ is equal to ‘expensive’, what do you think ‘wear’ is equal to?
Answer:
Answer
Linear momentum is conserved
0.4×4+0.4×2=0.8×v
as shown in figure and B.
v=
0.8
1.6+0.8
=3m/s
Kinetic energy before collision =
2
1
0.4(4)
2
+
2
1
0.4(2)
2
=3.2+0.8=4J
Kinetic after collision =
2
1
0.8(v)
2
=0.8×3
2
=3.6
Loss of kinetic energy =4−3.6=0.4J