Recent content by Kush

How could this be solved using work-energy theorem?

I have studied work done by a spring force which is W = -1/2 k x^2 but have not studied simple harmonic motion yet. Maybe force of a spring F=Kx applies?

I calculated these using the kinematics equations. Initial Horizontal Velocity (V0x) 5 Final Velocity (Vf) 30.41381 ---- Final Horizontal Velocity (Vfx) 5 ---- Final Vertical Velocity (Vfy) -30 Flight duration (t) : 3 sec I was unsure what equation to use at this point.

Homework Statement A boy launches a 20 g dart horizontally by a spring gun from a balcony 45 m above the ground. The dart lands 15 m away from the balcony. If the length of the gun’s barrel is 10 cm, what is the average horizontal force applied by the spring?(A) 1.0N (B) 2.0 N (C) 2.5 N (D) 5. N...