At a given instant the football player at A throws a football C with a velocity of 20 m/s in the direction shown. Calculate the relative velocity and relative acceleration of the football with respect to B at the instant the catch was made. Player B is 15 m away from A when A starts to throw the football. 20 m/s B Å 60⁰ 15 m
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- Daniel takes his two dogs, Pauli the Pointer and Newton the Newfoundland, out to a field and lets them loose to exercise. Both dogs sprint away in different directions while Daniel stands still. From Daniel's point of view, Newton runs due North at 3.90m/s, but from Pauli's point of view, Newton appears to be moving at 1.50 m/s due East. What must Pauli's velocity relative to Daniel be for this to be true? Express your answer in terms of the ? and ?‑components if North is the +? direction and East is the +? direction. a) ?-component (m/s): ?-component (m/s): b) Express your answer as a magnitude and an angle measured counter‑clockwise from due East.Mr. M's truck at a velocity of 14m/s [E]. At an exact instant, he sees his friend, Mr. T 35m away from him ([E] direction). At that instant when Mr. M measures Mr. T to be 35m away, Mr. M throws a ball straight up with the intent to hit Mr. T's head. What initial speed should he throw a ball (assuming he throws it straight up) to hit Mr. T? (assume Mr. T's head is level with where Mr. M releases the snowball)An athlete crosses a 28 meters wide river by swimming perpendicular to the water current at a speed of 1.1 m/s relative to the water. He reaches the opposite side at a distance of 42 meters downstream from his starting point. w = 28md = 42m vs = 1.1m/s What is the speed of the swimmer with respect to a freind at rest on the ground in m/s?
- Two cars are traveling in the same direction, Car A (60km/h) in front of Car B (40km/h). What is the velocity of car A relative to Car B?An object traveling at velocity v0 breaks into two objects, as shown in the diagram. What are the velocities of the 2 objects, in relation to v0 if Θ1 = 64 degrees and Θ2 = 25 degrees?An athlete crosses a 28 meters wide river by swimming perpendicular to the water current at a speed of 1.1 m/s relative to the water. He reaches the opposite side at a distance of 42 meters downstream from his starting point. w = 28md = 42m vs = 1.1m/s How fast is the water in the river flowing with respect to the ground in m/s?
- A train travels North at a speed of 50 m/s. A passenger walks toward the rear of the train at a speed of 2m/s. A person standing on a platform at the train station observes the motion of the pssenger as the train passes. According to the information from the previous paragraph and the diagram, what is the relative speed of the passenger with respect to the train station platform?Given the following figure, please explain to me how the velocity of car A relative to car B is obtained. The correct answer is 11.40 m/s with an angle of 30.3 but I do not how to get that answer. Please explain it as I want to understand how to get this answer and how to approach this problem.A child, who is L = 41 m from the bank of a river, is being carried helplessly downstream by the river's swift current of 1.0 m/s. As the child passes a lifeguard on the river's bank, the lifeguard starts swimming in a straight line until she reaches the child at a point downstream. a.) If the lifeguard can swim at a speed of 2.0 m/s relative to the water, how long does it take her to reach the child? Express your answer to two significant figures and include the appropriate units. b.)How far downstream does the lifeguard intercept the child? Express your answer to two significant figures and include the appropriate units.
- You ride in a boat on a river flowing at 1.7m/s(in the negative y direction). Suppose you would like the boat to move directly across the river (in the positive x direction) with a speed of 5.5m/s.What is the corresponding speed of the boat's velocity relative to the water?Express your answer to two significant figures and include appropriate units.Two friends, Barbara and Neil, are out rollerblading. With respect to the ground, Barbara is skating due south at a speed of 2.5 m/s. Neil is in front of her. With respect to the ground, Neil is skating due west at a speed of 2.1 m/s. Find Neil's velocity (a) magnitude and (b) direction relative to due west, as seen by Barbara.A football quarterback is moving straight backward at a speed of 3.8 m/s when he lobs eight football to the receiver 15 m straight down field if the ball is thrown an angle of 25° relative to the ground and is caught at the same height as it is released, what is the initial speed relevant to the ground in meters per second