If you toss a ball vertically upward in a uniformly moving train, it returns to its starting place. Will it do the same if the train is accelerating. Explain?

Q: Rain drops falling under gravity do not acquire very high velocity. Why?

A: This happens due to terminal velocity. When a rain drop falls under gravity through a viscous medium…

Q: A student sees her physical science professor approaching on the sidewalk that runs by her dorm. She…

A: The professor is 2.0s being directly under her window

Q: A stone is dropped from a balloon 3 seconds after it started rising at a constant velocity of 20 m/s…

A: t=3 secv1=20 msdistance, S=350 ma= 9.8ms2after 2 sec,another stone is thrown,v2=90 ms

Q: The heavy ball is 2 to 3 times heavier than the lighter ball. Does the heavier ball accelerate down…

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Q: if you are riding on a train that speeds past another train moving in the same direction on an…

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Q: Observers on two side-by-side trains—one green and one blue—look out the window at each other. The…

A: All the frames are with zero acceleration and thus inertial frames.

Q: Why is there a change in acceleration as ball rolls down in a ramp?

A: Force of gravity is always directed vertically downwards. When a ball rolls down in a ramp,…

Q: Is it possible that the velocity and the acceleration of body have opposite signs? Give one example.

A: Yes, it is possible that the velocity and the acceleration of body have opposite signs.

Q: Explain the difference between uniform motion and uniformly accelerated motion. Kindly elaborate and…

A: The difference between the uniform motion and uniformly accelerated motion are as follows: (1) In…

Q: Distance travelled by a body cannot be negative. Why?

A: Distance is a scalar quantity and can take only zero or positive values. The distance travelled by a…

Q: A bullet exits the muzzle of a rifle at a velocity of 360 mps and hits the target bullseye at a…

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Q: 71. Water at the top of Horseshoe Falls (part of Niagara Falls) is moving horizontally at 9.0 m/s as…

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Q: In a given vacuum without gravity a ping-pong ball was travelling at a straight path to the East at…

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Q: A ball is thrown three times at the same speed from the top of a building. One time it is thrown…

A: Since there is no air drag in all the three cases,energy will be conserved. Total energy of the ball…

Q: The velocity of a passenger with respect to the earth on a train moving east would be…

A: Relative velocity The velocity of an object A relative to another object B is the velocity that…

Q: If you drop a coin from the top of a boat's mast while the boat is moving forward at a constant…

A: It is given that the boat is moving with constant velocity and there is no acceleration.

Q: An air gun accelerates a 2.9 * 10^-3 nail from rest to a velocity of 540 m/s in the -z direction.…

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Q: You are standing on your balcony in an apartment building. You tossed a coin straight upwards at 4…

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Q: Two friends are tossing balls from the main floor of the auditorium to the balcony. One person…

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Q: If no brakes are used immediately, an automobile with a starting velocity of 30 mph or 44 feet/s…

A: Given The initial velocity of the car (U) = 44 ft/s Time taken by the driver to react = 3 sec…

Q: Two children are throwing a ball back-and-forth straight across the back seat of a car. The ball is…

A: Speed of ball with respect to car (Vbc)=10 mph. Speed of car (Vc)= 30 mph.

Q: You are going to your hometown by a bus that is moving with acceleration. During the journey, you…

A: Bus is moving with velocity and having acceleration.  When coin is tossed upward then it have same…

Q: A student sees her physical science professor approaching a sidewalk that runs by her dorm. She gets…

A: If the professor gets hit by the balloon, then the time taken by the balloon to reach the ground…

Q: A friend claims that a bullet fired by a high-powered rifle travels for many meters in a…

A: We can conclude the all bullets drop the same vertical distance in equal times. This is because…

Q: When a boat A moving with velocity 23.5 m/s and another boat B moving opposite to A with a velocity…

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Q: You stand on a top of a lighthouse while your friend is on the ground outside. You peered into the…

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Q: Two trains, each having a speed of 30 km/h, are headed at each other on the same straight track. A…

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Q: - A boat sets sail moving at 65 mph due S boat then encounters a head wind mov direction that the…

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Q: If the particle maintains the same acceleration, its speed after 100 seconds is?

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Q: In Italy it is customary to throw furniture out the window to ring in the New Year to “let go of…

A: The second equation of motion is  s = u t +0.5 at2 where, s is the distance, u is the initial…

Q: When the matchbox is on the toy car, it goes in the same direction as the toy car. When the matchbox…

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Q: A cat drops from a shelf 3.9 ft above the floor and lands on all four feet. His legs bring him to a…

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Q: A train travels on a track at a constant velocity of 100 Inside one of the train cars is a table and…

A: A train is moving with a constant velocity of 100 km/hr A book is kept on the table inside the…

Q: Discuss whether or not it is possible for an object to be increasing in speed as its acceleration is…

A: Speed is the derivative of distance with respect to time. It means increasing speed is the result…

Q: It was reported in World War I that a pilot flying at an altitude of 2 km caught in his bare hands a…

A: It is physically possible for this to happen. Suppose the bullet was shot from a position below the…

Q: A particle travels along a curved path between two points A and B as shown. Complete the following…

A: In this question we are given that a particle travels along a curved path between two points A and B…

Q: One airplane is flying north at 300 km/h, while another is flying at 300 km/h north east. Is its…

A: velocity of first airplane = 300 kmhr due northvelocity of second airplane = 300 kmhr due north east…

Q: A pitching machine is programmed to pitch baseballs horizontally at a speed of 83 mph. The machine…

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Q: Projectile motion is an example of two dimensional motion. Why?

A: The motion of a particle when the particle is thrown near the earth surface forms a curved path…

Q: boxer quickly learns to move his head backward when he sees he is going to receive a jab to the…

A: By moving his head backward  ,this head motion reduces the force of punch . And he will hurt less by…

Q: According to Guinness, the tallest man to have ever lived was Robert Pershing Wadlow of Alton,…

A: From kinematics, the expression for the final velocity is:

Q: carries private airplane cannot fly until it reaches a speed of 30 MS if it takes 10 s to accelerate…

A: Given : speed of airplane, s = 30 m/s Time taken by air plane = 10 s