Question

1. An object undergoes projectile motion. The objects launch height and landing height are the same. It travels horizontally 1.20 km in 4.00 seconds. Find the launch angle if the initial speed of the object is 350 m/s.

2. A 12.5 kg blue cart is released from rest at the top of a 2.25 m incline. It travels down a frictionless track to the bottom of the incline and then continues on a horizontal frictionless track where it collides with a stationary red cart also with mass 12.5 kg. The cart couples without deformation. What is the speed of the couple carts after the collision?

Answer 1

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EF Range RI 200 mis Time of Flight T=4 see inihal speed u = 3somis T= 2 usino 8 4= 2x350 x sino = 3.27° sino0.057 m= 12.5 kg cart cart 0-V mi ma g. asmen @74,= Speed of blue cart 1, at bottom U, = 52gh =9x9.& *3.35 4,- 6.64 m/s Afler collision both cant stuck to each other x move with common speed vi Mass of both carts are equal. using conservation of momentum mu,+ maua = (ma+ma) 4 12.5*6.64 + 0 = (13.5+19.5) v VS 12.5 X 6.64 V: 3.39 m)s 9x12.5