Answer:
0.25223 seconds.
Explanation:
= Mass of bullet = 0.0146 kg
= Mass of block = 2.55 kg
v = Combined velocity
= Velocity of bullet = 816 m/s
g = Acceleration due to gravity = 9.81 m/s²
As linear momentum is conserved
Now as the block (with the bullet in it) reverses direction and rises,
Equation of motion
The time t is 0.25223 seconds.
Answer:
If the speed of the object becomes double, its kinetic energy changes to four times the initial kinetic energy.
Example:
If Your Car is going 40MPH And The Kinetic Energy is lets just say 40 and you speed up to 80MPH and the kinetic energy stays at 40 your car would loose control but if the kinetic energy rises to 80 then the car would not lose control and you wouldnt have to worry
To calculate the frequency change of a moving source, the formula used is:
f = c*fo/(c+Vs)
where:
f = frequency observed
c = speed of sound
Vs = speed of source (positive if it's moving away from observer and negative if it is moving towards the observer)
fo = emitted frequency of the source
f = 342*652/(342-5)
f = 661.67 Hz or 662 Hz --> FINAL ANSWER
Answer:
The velocity of the astronaut is, v = - 0.36 m/s
Explanation:
Given data,
The mass of the astronaut, M = 84 kg
The mass of the gas expelled by the thruster, m = 35 g
= 0.035 g
The velocity of the gas expelled, v = 875 m/s
According to the conservation of momentum,
MV + mv = 0
V = - mv / M
Substituting the values,
V = - 0.035 x 875 / 84
= - 0.36 m/s
The negative sign in the velocity indicates the astronaut moves opposite to the direction of velocity of gas.
Hence, the velocity of the astronaut is, v = - 0.36 m/s