Do 5 Problems including #7, 20 points each must show all details for any partial credit)
1.) You shoot a projectile of mass 0.5 kg, at speed 12 m/s, at an angle of 50º, from the edge
of a 10 m cliff.
a) Use the equations of projectile motion to find
i) how long it will take to hit the ground,
ii) how high it reaches as measured from the ground level,
iii) how fast it is moving when it hits the ground.
b) Now use the energy conservation principle to obtain again
iv) how high it reaches as measured from the ground level,
v) how fast it is moving when it hits the ground.
Do the two methods give the same answers?
