Physics, 23.09.2019 22:40 foreverisabel
Ihave three questions. john has to hit a bottle with a ball to win a prize. he throws a 0.4 kg ball with a velocity of 18 m/s. it hits a 0.2 kg bottle, and the bottle flies forward at 25 m/s. how fast is the ball traveling after hitting the bottle?
2. someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (the block of woof is sitting on a frictionless surface, so it moves freely when the bullet hits it). the wood block is initially at rest. the bullet is traveling 300 m/s when it hits the wood block and sticks inside it. now the bullet and the woof block move together as one object. how fast are they traveling?
3. a big league hitter attacks a fastball. the ball has a mass of 0.16 kg. it is pitched at 38 m/s. after the player hits the ball, it is now traveling 44 m/s in the opposite direction. the impact lasted 0.002 seconds. how big of a force did the ballplayer put on that ball?
Answers: 2
Physics, 22.06.2019 03:30, coollid876
Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)
Answers: 1
Physics, 22.06.2019 05:30, kolibeilfuss
What is the most useful equation for electric power?
Answers: 3
Ihave three questions. john has to hit a bottle with a ball to win a prize. he throws a 0.4 kg ball...
Mathematics, 17.10.2019 05:20