A roller coaster is towed up an incline at a steady speed, Ask an Expert

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Q1. A blue ball is thrown upward with an initial speed of 21m/s, from a height of 0.5 meters above the ground. 2.60 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 12.50m/s from a height of 25.10 meters above the ground. The force of gravity due to the earth results in the balls each has the constant downward acceleration of 9.8 m/s2.

What is the height of the red ball 3.30 seconds after the blue ball is thrown.

Q2. Newton's second law
A roller coaster is towed up an incline at a steady speed of 0.51m/s by a chain parallel to the surface of the incline. The slope is 2.85 % that means that the elevation increases by 2.85 m for every 100m of horizontal distance. The mass of the roller coaster is 410kg. Neglect friction, what is the magnitude of force exerted on the roller coaster by chain?

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Category:- Physics
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