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Q1. A major league pitcher can throw a baseball in excess of 41 m/s. If a ball is thrown horizontally at this speed, how much will it drop by time it reaches a catcher who is 17m away from the point of release?
Q2. A popular ride at an amusement park involves standing in the cylindrical room. The room rotates and the wall presses against the rider as floor drops down until the rider is no longer touching it. Annabel has a mass of 55 kg and the coefficient of static friction between the wall and her is 0.480. What is the minimum normal force exerted on her from wall that will keep Annabel from sliding down?
One side of the roof of a building slopes up at 34.0°. A student throws a Frisbee onto the roof. It strikes with a speed of 15.0 m/s and does not bounce, but slides straight up incline. The coefficient of kinetic friction between plastic and roof is ..
With what force F should she pull down on the rope to accelerate herself and platform upward at a rate of 0.77 m/s2.
Objective questions based on work, energy, power.
A 32.0 kg hammer strikes a steel spike 2.70 cm in diameter while moving with speed of 24.0 m/s. The hammer rebounds with speed 11.0 m/s after 0.110 s. What is an average strain in the spike all through the impact.
The suspended 2.82 kg mass on the right is moving up, the 2.2 kg mass slides down the ramp, and the suspended 8.1 kg mass on the left is moving down. There is friction between block and ramp. What is the acceleration of a three block system.
The bowling ball has a diameter of 20.6 {rm cm}, and the angle the stick makes with the horizontal is 30.0 {rm ^circ}. You may suppose there is no friction between the stick and the bowling ball, though friction with the floor must be taken into acco..
A 67.3 kg sled starts at rest on a horizontal road. The coefficient of kinetic friction between the sled and the road is μk = 0.202. A man pulls the sled a distance 5.07 m along the ground by exerting a constant force of magnitude 532 N on a rope tha..
Find out the speed of a 56.7 kg thrill seeker at the bottom of the slide, assume no friction. If the thrill seeker has a speed of 24.1 m/s at the bottom, find out the change in mechanical energy due to friction.
Two identical 10 g iron springs, except that one has been wound using work W, are dropped into equal volumes of 15M HC1 in two identical constant volume calorimeters, that are adiabatically insulated. The HC1 will dissolve iron springs. What differen..
From what height will you have to drop the rock on Earth so that the fall-time on both planets is the same.
What is the speed of the center of mass
A particle undergoes a displacement Δr of magnitude 57 m in a direction 25° below the x axis. Express Δr in terms of the unit vectors x and y.
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