A person is moving upward in a high-rise office building using an elevator with an initial speed of 15 m/s. Three seconds later, he is still moving upward, but his speed has been reduced to 6.0 m/s. A.What is the average acceleration of the person standing in the elevator during the 3.0 s interval? B.If he maintains the same acceleration how much distance he will travel after 5 seconds total? C.What is the person's speed after 5 seconds total?

Suppose that a passenger intent on lunch during his first ride in a hot-air balloon accidently drops an apple over the side during the balloon’s liftoff. At the moment of the apple’s release, the balloon is accelerating upward with a magnitude of 4.0 m/s2 and has an upward velocity of magnitude 2 m/s.a.)What is the magnitude of the acceleration of the apple just after it is released?b.What is the direction of the acceleration of the apple just after it is released?c.Just then, is the apple moving upward or downward, or is it stationary?d.What is the magnitude of its velocity just then?e.In the next few moments, does the speed of the apple increase, decrease, or remain constant?

4. At the construction site of a tall building, a worker is in an elevator descending at a constant downwards velocity of 5 m/s. When the elevator is 40 meters above ground level, her friend, standing at ground level, tosses a wrench straight upward with an initial speed of 25 m/s. Take the time when the wrench is tossed as t = 0. For this problem, use g = 10 m/s². a. Draw a labeled picture with symbols and all relevant values. Quantities that are different should be given different symbols, for example y, and Yw. b. Graph the velocities versus time of the elevator and the wrench on the same graph. Label axes of the graph (with units). C. At what time does the wrench and the elevator have the same velocity? 20 10 -10 -20 3 4 time (s) d. Which object (the wrench or elevator) is higher when their velocities are the same? By how much is one object higher than the other at this time? (s/u) ka

A. Calculate the average acceleration for the first ten seconds  B. Calculate the average acceleration for the entire trip  C. On what intervals of time is the particle moving to the right, moving to the left, a temporary at rest ? D. On what intervals of time is the particle moving with a constant velocity increasing velocity and decelerating  calculate its instantaneous acceleration at t=2s  Graph given is x: time. Y: velocity

A stone is dropped at height 500 m from the ground. After 2 seconds, another stone isthrown upward with an initial velocity of 70 m/s. Assume acceleration due to gravity is9.81 m/s2.a. What is the time when they will meet?b. What is the height h, from the ground, where they will meet?

Suppose that the gravitational acceleration on a certain planet is only 3.0 m/s2. A space explorer standing on this planet throws a ball straight upward with an initial velocity of 18 m/s. a. What is the velocity of the ball 4 seconds after it is thrown? b. How much time elapses before the ball reaches the highpoint in its flight?

The takeoff speed for an Airbus A320 jetliner is 80 m/s. Velocity data measured during takeoff are as shown in the table.a. What is the jetliner’s acceleration during takeoff, in m/s2 and in g’s?b. At what time do the wheels leave the ground?c. For safety reasons, in case of an aborted takeoff, the length of the runway must be three times the takeoff distance. What is the minimum length runway this aircraft can use?

A stone is thrown straight up from the edge of a roof, 650650 feet above the ground, at a speed of 1616 feet per second.A. Remembering that the acceleration due to gravity is −32ft/sec2−32ft/sec2, how high is the stone 55 seconds later?B. At what time does the stone hit the ground?C. What is the velocity of the stone when it hits the ground?

Include a picture or description of your coordinate system (origin, positive direction).

1. The acceleration of a car is given by a(t) = A – Bt + Ct² , where A = 1.0 m/s², B = 0.5 m/s³, C = 2.0 m/s“. The car is at rest at the origin at time t= 0. Find its position and velocity as a function of time. b. Sketch its position, velocity, and acceleration. a.