10,000 kg railroad car is moving at 2.00 m/sec when a 4000 kg load of gravel is suddenly dropped in. What is the car’s speed just after the gravel is loaded
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A 10,000 kg railroad car is moving at 2.00 m/sec when a 4000 kg load of gravel is suddenly dropped in. What is the car’s speed just after the gravel is loaded?
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- A 0.2 kg softball is thrown straight up with an initial speed of 9 m/s. How high in meters does it go? Round to two significant figures.Gayle runs at a speed of 3.65 m/s and dives on a sled, initially at rest on the top of a frictionless snow-covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they continue down the hill. What is their speed at the bottom of the hill if the total vertical drop is 15.0 m? Gayle's mass is 48.0 kg, the sled has a mass of 5.45 kg and her brother has a mass of 30.0 kg. m/swith what force will 1055 kg car that is accelerating at 2.44 m/s/s hit a tree?
- 1. A hose sprays water into a train car. The hose is fixed in place and directed along the tracks, and the train car can move along the tracks without friction. The hose sprays water at a fixed rate a ([a] =MT-1) and speed v; the mass of the empty car is M. If the train car starts empty and at rest at t = 0, what is its speed at time t?A 0.7 ball falls down and hits the floor at a speed of 15 m/s. The ball then bounces back up at aspeed of 12 m/s. If the ball was in contact with the floor for 0.06 s, what was the average force from the floor on the ball?Gayle runs at a speed of 3.60 m/s and dives on a sled, initially at rest on the top of a frictionless snow - covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they continue down the hill. What is their speed at the bottom of the hill if the total vertical drop is 15.0 m? Gayle's mass is 46.5 kg, the sled has a mass of 5.10 kg and her brother has a mass of 30.0 kg.
- Gayle runs at a speed of 4.35 m/s and dives on a sled, initially at rest on the top of a frictionless snow-covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they continue down the hill. What is their speed at the bottom of the hill if the total vertical drop is 15.0 m? Gayle's mass is 49.5 kg, the sled has a mass of 5.25 kg and her brother has a mass of 30.0 kg. m/s Need Help?Gayle runs at a speed of 3.20 m/s and dives on a sled, initially at rest on the top of a frictionless snow-covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they continue down the hill. What is their speed at the bottom of the hill if the total vertical drop is 15.0 m? Gayle's mass is 45.0 kg, the sled has a mass of 5.25 kg and her brother has a mass of 30.0 kg. m/sPretend you are standing on roller skates and toss a football. If the football has a mass of 0.3 kg and is traveling at 26 m/s, and you and your skates have a mass of 90 kilograms, what is your speed after you throw the ball? Assume no friction. A: 0.087 m/s B: 7.9 m/s C: 87 m/s D: 9.8 m/s
- 7. A 730-N man stands in the center of a frozen pond of radius 5.00-m. There is no friction between the man's shoes and the ice, preventing him from walking off of the pond. The man then picks up a 1.20-kg rock lying beside him and throws it horizontally at a speed of 5.00-m/s. How long does it take the man to reach the edge of the pond? Answer: 61.7 sA Box of mass 1.2 kg is dropped from a window. the box starts from rest (inital speed 0). Immediately before hitting the ground the box has a speed of 34.34 m/s. It takes the boxs 0.017s for the box to come to rest after hitting the ground. What is the average net force on the box while it comes to rest. Round to the nearest whole number.