What work is said to be done to increase the velocity of a car from 15 km per hour to 30 km per hour if mass of the car is 1000 kg
Answers
Answered by
2
M = 1000 kg
u = 15 km/h = 50/12 m/s
v = 30 km/h = 100/12 m/s
Work done = change in K.E.
K.E. = 1/2 mv² = 1/2 * 1000 * 50/12 * 50/12 = 8680.5 J
K.E. = 1/2 mv² = 1/2 * 1000 * 100/12 * 100/12 = 34722.2 J
34722.2 - 8680.5 = 26041.7 J
Hence work done = 26041.7 J
u = 15 km/h = 50/12 m/s
v = 30 km/h = 100/12 m/s
Work done = change in K.E.
K.E. = 1/2 mv² = 1/2 * 1000 * 50/12 * 50/12 = 8680.5 J
K.E. = 1/2 mv² = 1/2 * 1000 * 100/12 * 100/12 = 34722.2 J
34722.2 - 8680.5 = 26041.7 J
Hence work done = 26041.7 J
Answered by
1
So, W o r k space d o n e space o n space t h e space c a r space equals space I n c r e a s e space. An objects thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie onthe same horizontal line.
Similar questions