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Q. A 40 kg gymnast hangs vertically from a pair of parallel rings.
If the ropes supporting the rings are attached to ceiling directly above, what is the tension in each rope?
Q. In 2 minutes, a ski lift raises 3 skiers at steady speed to a height of 175 m. The average mass of each skier is 65.00 kg. What is the average power provided by the tension in the cable pulling the lift?
How far from a 53.6 mm focal-length lens must an object be placed if its image is to be magnified 2.12X and be real.
An outfielder throws a 0.150 kg baseball at a speed of 39.6m/s and an initial angle of 34° What is the kinetic energy of the baseball at the highest point of its trajectory.
Objective questions based on force and acceleration.
A playground is on the flat roof of a city school, 5 m above the street below (see figure). The vertical wall of the building is h = 6.20m high, to form a 1.20 m high railing around the playground.
With what minimum speed must you toss a 160 g ball straight up to hit the 10 m high roof of the gymnasium if you release the ball 1.60m above the ground? Solve this problem using energy.
A 2.16 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0320 m. The spring has force constant 840 N/m.
The potential at the center of a uniformly charged ring is 52 kV, and 15 cm together the ring axis the potential is 41 kV. Find the ring's radius and its total charge.
with what speed would the arrow leave the bow.
A 96N grocery cart is pushed 10m along an aisle by a shopper who exerts a constant horizontal force of 40-N. If all frictional forces are neglected and cart starts from rest, what is the grocery cart's final speed.
If the beam now strikes the top of a building standing directly at the water's edge, find out the height of the building.
A small car with mass 0.690 travels at constant speed on the inside of the track that is a vertical circle with radius 5.00. If the normal force exerted by the track on the car when it is at the top of the track (point) is 6.00, what is the normal fo..
Two runners start simultaneously from the same point on the circular 200 m track and run in opposite directions. One runs at a constant speed of 6.14 m/s and the other runs at a constant speed of 5.43m/s. When they first meet, for how long a time ..
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