Recent content by PhysicFailure

2. Homework Equations Wncf= \DeltaMEtotal

Homework Statement When a 0.045 kg golf ball takes off after being hit, its speed is 42 m/s. (a) How much work is done on the ball by the club? ---> 39.69 J (b) Assume that the force of the golf club acts parallel to the motion of the ball and that the club is in contact with the ball...

haha thanks so much bchandler and mattowander. I actually figured out what I was not doing. I could just solve it! and for some reason i was just not thinking...THANK YOU!

A helicopter is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 57600 N. The lift force L generated by the rotating blade makes an angle of 21.0° with respect to the vertical. (a) What is the magnitude of the lift force in N? (b) Determine the...

oh i got the answer! I used this equation and used the quadratic formula: -4.9t^2+t(Velocity of pellet gun-velocity of balloon)-12=0 then plugged those two answers into the following as is: 0.628 into distance of balloon=12+speed(0.628)= 17.5 m and distance of pellet=initial...

A hot air balloon is ascending straight up at a constant speed of 8.80 m/s. When the balloon is 12.0 m above the ground, a gun fires a pellet straight up from ground level with an initial speed of 31.0 m/s. Along the paths of the balloon and the pellet, there are two places where each of them...

A typical home uses approximately 1600 kWh of energy per month.If the energy came from a nuclear reaction, what mass would have to be converted to energy per year to meet the energy needs of the home? (in g/year) I don't know how to do this problem :S