Two students perform an experiment with a train and a ball. Michelles rides on a fltcar pulled at 7.85 m/s by a train on a straight, horizontal track; Gary stands at rest on the ground near the tracks. When michelle throws the ball with an initial angle of 57° above horizontal, from her point of view, Gary sees the ball rise straight up and back down above a fixed point on the ground. A. Did michelle throw the ball toward the front of the train or toward the rear of the train? Explain b. What was the initial speed of Michelle’s throw? c. What was the initial speed of the ball as seen by Gary?

Part A and B on paper

A helicopter blade spins at exactly 110 revolutions per minute. Its tip is 9.5 m from the center of rotation. A. What is the average speed of the blade tip in the helicopter's frame of reference, in meters per second?  B. What is the average velocity over one revolution, in meters per second?

A ball is thrown horizontally from the top of a building 22m high.the ball strikes the ground at a point 35 m horizontally away from and below the point of release.Air resistant is neglected from this problem.c.what is the intial velocity of the ball in the horizontal direction?

David is buying a jet boat this summer and spending a lot of time zooming around. One place he plans on going is to the Plate River above Albany, NY. The current is 4 m/s south and the river is 200m wide. the boat will move at 20 m/s at full throttle, his only setting.  A. how quickly will he cross the river if he heads straight across?B. how far downstream will he end up if he does so?C. if he wants to go straight across, what angle upstream should he use?

An arrow is shot from a height of 1.75 m toward a cliff of height H. It is shot with a velocity of 32 m/s at an angle of 60° above the horizontal. It lands on the top edge of the cliff 3.65 s later.a. what is the maximum height reached by the arrow along its trajectory in meters?b. what is the arrows speed just before hitting the cliff in m/s?

E (2) Pars ats to the other side c) Calculate the otter's velocity, relative to the bank from where it started. viszsub ain biz silto ortof 5 67 18010 Your flight to your friend's house in Halifax has a short layover in Toronto. Your total flight time is 6.25 hours. The first flight to Toronto covers a distance of 2700 km [35.07 of E], and the second flight to Halifax covers a distance of 1280 km [10.0° N of E]. Total: 6.25 hours a) What was the total distance you traveled? Show all work. flight 1: 2700 Kim [35.0°sof 3] [10.0° MofE]

A college student produces about 122 kcal of heat per hour on the average. What is the rate of energy production in joules?=_________ kJ/h

3. Penny drops a leaf into the water which runs east downstream. She measures the distance the leaf travels as 3.0 meters in 9.0 seconds. Penny then swims across the river, orienting herself perpendicular to the water, and lets the river current carry her downstream. She swims across the 57 m wide river in 47 seconds. a. Sketch the overall vectors of the velocities of the person to the water, the water to the ground and the person to the ground. Write the equation for the velocity of the person relative to the ground with the appropriate subscripts b. Determine the velocity of the water in the river relative to the ground. c. How far downstream will Olaf drift?" d. Determine the velocity of the person relative to the water (with direction) e. Determine the velocity of the person relative to the ground (with direction).

Whale sharks swim forward while ascending or descending. They swim along a straight-line path at a shallow angle as they move from the surface to deep water or from the depths to the surface. In one recorded dive, a shark started 50 m below the surface and swam at 0.85 m/s along a path tipped at a 13° angle above the horizontal until reaching the surface. a. What was the horizontal distance between the shark's starting and ending positions?