2. a 20 gram bullet exits the rifle at a speed of 985 m/s. the gun barrel is 0.8 m long. What was the force during the firing.
3. A force of 380 N is applied to a 38 kg object over a distance of 2.5 meters. What is the speed
of the object after it accelerates?
4. A 21,000 kg train is traveling at 21 m/s. It accelerates as it enters a tunnel because of a constant force of 45,000 N from the engine. The train is in the tunnel for 5.25 seconds. What is the final speed of the train?
Answers: 3
Physics, 21.06.2019 16:10, sruthivada
If two metal balls each have a charge of -10^-6 c and the repulsive force between them is 1 n, how far apart are they? (coulomb's constant is k = 9.0x 10^9 n-m^2/c^2? 9.5 m 9.0 mm 9.5 cm 0.9 m .
Answers: 3
Physics, 22.06.2019 11:00, tdahna0403
Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide? kg • what must the total momentum of the system be after the train cars collide? kg •
Answers: 2
Physics, 22.06.2019 15:30, sandra5456
An alien spaceship is 500 m above the ground and moving at a constant velocity of 150 m/s upwards. how high above the ground is the ship after 5 seconds?
Answers: 1
2. a 20 gram bullet exits the rifle at a speed of 985 m/s. the gun barrel is 0.8 m long. What was th...
English, 06.10.2020 01:01
English, 06.10.2020 01:01