Recent content by ges9503

Homework Statement A box of mass 6.30 kg is dropped from a height of 2.10 m onto a super-sized skateboard of mass 8.70 kg that rolls on a horizontal surface where no friction acts. Initially the skateboard moves at 7.00 m/s. (a) Assume that the box stays on the skateboard. What is the final...

Ok, so you said that I can use conservation of momentum for the interaction between the bullet and block. So is it correct to find the speed of the block using m1v1=m2v2 (m1v1)/m2=v2 (.025kg*80m/s)/3kg v2= .66666667 m/s ?

Homework Statement I fire a bullet at a ballistic pendulum. The large block of wood has a mass M2 = 3.000 kg, and the bullet has a mass of m1 = 25.0 g. The bullet completely penetrates the wood and emerges with a speed of vf = 80.0 m/s. The wood, as part of a pendulum, swings up to a maximum...