Answer:
A man pushes very hard for several seconds upon a heavy rock, but the rock does not budge. Has the man done any work on the rock? Explain. No, because work=force X distance and the rock did not move so the distance was zero.
Answer:27.35 s
Explanation:
Given
weight of man =730 N
mass of man
radius of pound r=5.8 m
mass of book
velocity of book
let be the velocity of man
conserving momentum
time taken by man to reach south end
Answer:
m = 500 grams
Explanation:
Assuming that the fulcrum is at the midpoint of a uniform meter stick, the moments about the fulcrum must be equal and opposite.
the 200 g mass makes a moment
200(g)[20] = 4000g gm•cm
the other mass must also create a moment of the same value
m(g)[8] = 4000g
m[8] = 4000
m = 500 grams
Answer:
total volume is 0.9125 m³
Explanation:
given data
oil = 28 litres
pressure p = 40 MPa
final pressure p2 = 35 MPa
initial pressure p1 = 30 MPa
y = 1,4
to find out
volume of accumulator
solution
so we here say that volume of oil
v3 - v2 = 28 litres
so v3 = 0.028 + v2 ......................a
and volume formula is
v1 = v2 ...................1
so v2 = v3 ..............2
put here value in equation 2
v2 = (0.028 + v2)
v2 = 0.274 m³
and here v1 will be
v1 = 0.274
v1 = 0.3365 m³
and v3 will be
v3 = 0.028 + v2
v3 = 0.028 + 0.274
v3 = 0.302 m³
so
total volume is v1 + v2 + v3
total volume = 0.274 + 0.3365 + 0.302
total volume is 0.9125 m³
Answer:
what is flowing in physical?
Explanation: