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(a) What is the tangential acceleration of a bug on the rim of a 7.0 in. diameter disk if the disk moves from rest to an angular speed of 75 rev/min in 3.0 s?
(b) When the disk is at its final speed, what is the tangential velocity of the bug?
(c) One second after the bug starts from rest, what is its tangential acceleration?
What is its centripetal acceleration?
What is its total acceleration?
A bike coasts up a long hill. The hill has an incline of 38 degrees. The mass of the bike and rider is 129kg. If the bike starts up the hill at a velocity of 10 m/s, how far will the rider go up the hill before stopping? The coefficient of kinetic friction is .30 .
A 1100kg car accelerates from 48 km/hr to 59 km/hr over 100m. What was the magnitude of the net force acting on it?
A flat (unbanked) curve on a highway has a radius of 215.0 m . A car rounds the curve at a speed of 25.0 m/s .What is the minimum coefficient of static friction that will prevent sliding?Suppose that the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you found in the previous part. What should be the maximum speed of the car so it can round the curve safely?
homework help
A fireworks rocket is fired vertically up. at its maximum height of 60.0m, it explodes and breaks into two pieces, one with mass 1.20kg and the other with mass 0.30kg, both with horizontal initial velocities. in the explosion, 0.960kJ of chemical energy is converted to the kinetic energy of the two fragments.
What is the speed of each fragment just after the explosion? it is observed that the two fragments hit the ground at the same time. what is the distance between the points on the ground where they land? Assume that the ground is level and air resistance can be ignored.
Explain the difference in the distances travelled by the fragments if any.
Air expands from 5 litres to 10 litres at 2 atm pressure. What is the eternal work done?
I have a question about the change within the current of an xray spectrum, How does that work and why is it important,
i have a circuit of 2 loops where is one of them is paralell circuit
i found out that the battery in a branch is 20 v and in the other is 5 V .. The R in 20v branch is 5 and in the other is also 5 .. So how is the voltage constant ?!! Knowing that in parallel circuits V is constant ..could you clarify this to me please ??
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Ques no. 13 , 14 &15 on