Acannon on a railroad car is facing in a direction parallel to the tracks. it fires a 97.00 kg shell at a speed of 105 m/s (relative to the ground) at an angle of 60.0° above the horizontal. if the cannon plus car have a mass of 4.9 × 104 kg, what is the recoil speed of the car if it was at rest before the cannon was fired?

recoil velocity of canon is 0.1039 m/s

Explanation:

given,

mass of shell = 97 kg

speed at which the shell is fired = 105 m/s

angle at which the shell is fired (θ) = 60°

mass of cannon plus car = 4.9 × 10⁴ kg

by conservation of momentum

    ∑ P = 0

recoil velocity of canon is 0.1039 m/s

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more