give me some practice questions based on relative velocity classs 11th physics.
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Q1.A motorcycle traveling on the highway at a speed of 120 km/h passes a car traveling at a speed of 90 km/h. From the point of view of a passenger on the car, what is the velocity of the motorcycle? Answer: 30 km/h
Q2.A ball is kicked off the back of a pickup truck traveling at 50 km/h. A pedestrian on the ground sees the ball hit the pavement and then bounce straight up. What was the velocity of the ball relative to the truck?
Q3.A duck swims at a constant speed from one side of a river to the other side in a time of 4 seconds. The river is 6 meters wide and it is flowing at a speed of 2 m/s. What is the velocity of the duck and what is its direction of travel, with respect to ground?
Q4.In a skills competition, a hockey player is skating across the ice at a velocity Vh and tries to hit a target with the puck, as shown in the figure below. If the velocity of the puck relative to the player is Vp, at what angle θ must the player hit the puck, relative to the line of sight between puck and target, so that the puck hits the target?
Q5.A scotch yoke mechanism is shown in the figure below, with dimensions given in units of meters. The pin is rigidly connected to the crank wheel which is rotating at w radians per second. Since the scotch yoke is being used in a food plant and contamination must be prevented, the pin is made of smooth plastic, with no lubrication applied. To prevent excessive frictional heating, the sliding velocity of the pin relative to the slot is to be no more than 5 m/s. What is the maximum value of w to make sure this limit is not exceeded?
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