1. A fisherman is standing on the top of a bridge that is 80 meters high, and throws a sword towards a fish that is jumping 20 meters above the water.
Ps Mass of the sword is 200.00 grams and the mass of the fish is 500 grams.
a) What is the speed of the sword spearing the fish if the swords initial velocity is 6m/s?
b) At what velocity does the spear and fish hit the water?
c) How long does it take for the sword to spear the fish?
d) How long does it take for the fish to hit the water?
e) What is the momentum of the spear and fish when they hit the water?
2. A baseball with the mass of 500 gram is thrown into the air and reaches the height of 150 meters.
a) What is its velocity when it hits the ground?
b) What is its potential energy at its maximum height?
c) What is the total work?
3. A cart mass of 28 kg is moving 26 km/hr to the right on a track. It collides with a cart of mass of 15 kg. The final velocity of carts that become stuck together after the collision is 5 km/hr to the right. What is the velocity of the second cart before the collision?