Physics, 18.10.2019 07:00 firdausmohammed80

Abullet of inertia m traveling at speed v is fired into a wooden block that has inertia 4m and rests on a level surface. the bullet passes through the block and emerges with speed v/3, taking a negligible amount of the wood with it. the block moves to the right but comes to rest after traveling a distance d.

what is the magnitude of the frictional force between the block and the surface while the block is moving?

what is the ratio of the energy dissipated as the bullet passes through the block to the energy dissipated by friction between the surface and the bottom face of the block?

i solved the first one and got (4mv^2)/(9d) but it said "your answer either contains an incorrect numerical multiplier or is missing one" so i'm not really sure what i did wrong.

Answers: 1

Show answers

Another question on Physics

Physics, 21.06.2019 18:00

Alivestock company reports that the mean weight of a group of young steers is 1100 pounds with a standard deviation of 93 pounds. based on the model n(1100,93) for the weights of steers, what percent of steers weigh a) over 1050 pounds? b) under 1300 pounds? c) between 1150 and 1250 pounds?

Answers: 1

Answer

Physics, 22.06.2019 13:30

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.

Answers: 2

Answer

Physics, 22.06.2019 14:30

Increasing the pressure on one spot of a fluid will increase the pressure everywhere else in the fluid a. pascals principal b. archimedes' principal c. bernoulli's principal

Answers: 1

Answer

Physics, 22.06.2019 16:40

Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.

Answers: 3

Answer

You know the right answer?

Abullet of inertia m traveling at speed v is fired into a wooden block that has inertia 4m and rests...

Questions