Choice-'b' says the formula for kinetic energy in words.
KE = (1/2) · (M) · (S²)
Answer:1.33 hr
Explanation:
Given
Speed of airplane relative to air=627 km/h
Distance traveled =787 km
Speed of wind=38.4 km/h
Wind is blowing in opposite direction therefore net speed is
thus time taken is
THIS DUDE REALLY SHOWED US CAT TURDS...... IM DYING LM.AOOOOOOOO
BAHAHAHA
F = ma
We have mass = 20kg
And we need to solve for acceleration
So acceleration is change in velocity over time, in this case we have one velocity and we can assume the man started from rest so
12.3 / 0.9 = a
a = 13.6667
Now we can plug that into F = ma
F = (20)(13.6667)
F = 273.334
Rounding
F = 273.33
Now he is traveling east so we need a force towards the rest, or in the opposite direction to stop his motion.
If we assume east is the positive direction then we need a force of
-273.33 N to stop the man or 273.33 towards the west.
Answer: 42g
Mass will still stay the same because mass is a weight without pull of gravitational force. So whichever plant it is in, even in jupiter, the mass is going to be 42g.
