A stone is thrown vertically upward from the ground with a speed of 30 meters per second. Calculate the time of flight of the stone in coming back to its origin.
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- A bullet in a gun is accelerated from rest from the firing chamber to the end of the barrel at an average rate of 6.25 × 105 m/s2 for 8.3 × 10-4 s. What is the gun’s muzzle velocity (that is, the bullet’s final speed), in meters per second?Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3 m/s and Betty has a speed of 2 m/s. Their dog, Spot, starts by Arthur's side at the same time and runs back and forth between them at 5.0 m/s. By the time Arthur and Betty meet, what distance has Spot run? (in meters)A car traveling with an initial velocity of 18 m/s accelerates at a constant rate of 3 m/s squared for 4 seconds. What distance does the car travel during this process? 
- I was standing on the side of a 10-m foot bridge, holding a ball while watching a car approaching the bridge at uniform speed. When the car was 15 meters away from where I was standing, the ball that I was holding slipped in my hand and the car arrived at the bridge when the ball hit the ground. What was the speed of the train? ( Assume that the final velocity of the ball is NOT zero)You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 8.4 m/s. (a) When the tennis ball is at a height of 2.2 m above the ground, what is its speed (in m/s)?Francesco, a pizza chef preparing the dough for your pizza is throwing it to expand it. In this process, you notice that a chunk of it comes off, flying separately from the rest and on to the floor. If Francesco is 6 feet and 0 inches tall, and the chunk flies off vertically straight up from this height at a speed of 1 m/s, with what speed does the chunk hit the ground? Express your answer to three significant figures and include the appropriate units. HA ? x" X•10 Value Units Submit Previous Answers Request Answer
- Francesco, a pizza chef preparing the dough for your pizza is throwing it to expand it. In this process, you notice that a chunk of it comes off, flying separately from the rest and on to the floor. If Francesco is 6 feet and 0 inches tall, and the chunk flies off vertically straight up from this height at a speed of 1 m/s, with what speed does the chunk hit the ground? Express your answer to three significant figures and include the appropriate units. HA ? Value Units Submit Request AnswerA bullet in a gun is accelerated from the firing chamber to the end of the barrel at an average rate of 6.20×105 m/s2 for 8.10×10−4 s . What is its muzzle velocity (that is, its final velocity)?A bunch of keys was thrown directly upward by Macoy, who is looking out of the window, to be caught by Len-Len living on a room right above him. Unfortunately, Len-Len wasn't able to catch the keys and therefore the bunch of keys went straight to the ground. If Macoy gave the keys an upward speed of 3 m/s and the keys reached the ground after Macoy threw the keys upward in 4 seconds, the speed of the keys just before it reached the ground is 36.2 m/s the height of his room from the ground is 66.4 m c. What is the keys' acceleration when it reached its highest point?d. What is the keys' velocity when it reached its highest point?
- Moving sidewalks are installed every other 50 meters along the entire stretch of an airport walkway. These sidewalks move at a constant speed of 1 m/s. A lady passenger takes one of the sidewalks to go from one point to the next. If the passenger decides to go back using the same sidewalk at 1 m/s, how long will it take to reach her point of origin?A shotgun is shot upward from the earth with initial speed of 25 m/sec. How high is it when its final speed is 5 m/secIn an experiment, a shearwater (a seabird) was taken from its nest, flown a distance 5040 km away, and released. It found its way back to its nest a time 12.4 days after release. If we place the origin in the nest and extend the +x-axis to the release point, what was the bird's average velocity for the return flight?