What is the resistance of a 4.2 m length of copper wire 1.9 mm in diameter? Express your answer to two significant figures and i
nclude the appropriate units.
2 answers:
You might be interested in
Answer:
Impulse = 10.36 kg m/s
average force = 172.667 N
Explanation:
given data
mass = 0.280 kg
speed = 15.0 m/s
speed = 22.0 m/s
to find out
impulse and magnitude of the average force
solution
we know that Impulse is change in momentum that is
initial momentum = mass × speed ..........1
initial momentum = 0.28 × (15)
initial momentum = 4.2 kg m/s
Final momentum = mass × speed ..........2
Final momentum = 0.28 × (-22)
Final momentum = -6.16 kg m/s
so now we get Impulse that is
Impulse = 4.2 - (-6.16)
Impulse = 10.36 kg m/s
and
average force will be
average force = impulse ÷ time
average force =
average force = 172.667 N
Answer:
Velocity after collision will be 20 m/sec
Explanation:
We have given mass of arrow
Mass of arrow
Mass of apple
Apple is at rest so velocity of apple
According to conservation of momentum
Momentum before collision is equal to momentum after collision
v = 20 m/sec