Figure 2 shows a block (m, = 5kg) moving at 11" towards a second block (m, = 8kg) at rest at the foot of a circular loop (of radius .75m). The two blocks collide elastically, after which point block 2 starts moving up the loop. There's no friction in this problem!
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- A 22 g golf ball is placed at the top of a loop de loop track 45 cm above the top of a desk and released from rest. After the ball moves through the track, it rolls off of the table. If the table is 1.75 meters tall, how far does the golf ball travel before hitting the ground? (Friction and air resistance are negligable)The balls A and B in the figure are attached to stiff rods of negligible weight. Ball A is released from rest and allowed to strike B. If the coefficient of restitution is 0.6, determine the angle through which ball B will swing. If the impact lasts for 0.01 s, also find the average impact force. 10 ft 10' 60° Ih A WA 30lb b 8 ft B We-20lbMitch throws a 132—gram lump of clay at a 636 g target, which is at rest on a horizontal surface. After impact, the target slides 5.5 m before stopping. If the coefficient of friction is 0.68, find the speed of the clay before impact.
- An object at rest is suddenly broken apart into fragments A and B by an explosion. The fragment A acquires three times the kinetic energy of the fragment B. What is the ratio of their masses?A railroad cart with a mass of m₁ = 12.6 t is at rest at the top of an h = 10.3 m high hump yard hill. m m₂ h After it is pushed very slowly over the edge, it starts to roll down. At the bottom it hits another cart originally at rest with a mass of m₂ = 18.6 t. The bumper mechanism locks the two carts together. What is the final common speed of the two carts? (Neglect losses due to rolling friction of the carts. The letter t stands for metric ton in the SI system.)Two figure skaters, one weighing 625 N and the other 725 N, push off against each other on very smooth ice. a)If the heavier skater travels at 1.50 m/s, how fast will the lighter one travel? b)How much kinetic energy is "created" during the skaters' maneuver?
- Two metal spheres are suspended by vertical cords as shown below. Sphere 1, m = 25g, is pulled to a height hị = 8.0cm and then released from rest. After swinging down, it undergoes an elastic collision with sphere 2, m2 = 80g. What is the velocity of sphere 1 right after the collision? To what height will sphere 2 rise?Gayle runs at a speed of 3.65 m/s and dives on a sled, initially at rest on the top of a frictionless snow-covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they continue down the hill. What is their speed at the bottom of the hill if the total vertical drop is 15.0 m? Gayle's mass is 48.0 kg, the sled has a mass of 5.45 kg and her brother has a mass of 30.0 kg. m/sJack D. Ripper flipped out after missing a Must-Do-It question for the third time on his Minds On Physics assignment. Outraged by the futility of his efforts, he flings a 4.0-gram pencil across the room. The pencil lodges into a 221.0-gram Sponge Bob doll which is at rest on a countertop. Once in motion, the pencil/doll combination slide a distance of 11.9 cm across the countertop before stopping. The coefficient of friction between the doll and the countertop is 0.325. Determine the speed at which the pencil is moving prior to striking Sponge Bob.
- 2. Block 1 of mass m, slides from rest along a frictionless ramp from height h = 1.60 m and then collides (completely inelasticly) with stationary block 2 of mass m2 = 3.00 m,. After the collision, the two blocks slide into a region where the coefficient of kinetic friction is µk = 0.300 and come to a stop in distance d within that region. %3D ↑ m2 a) What is the speed of m, when it reaches the bottom of the ramp? b) What is the speed of the combination of the two blocks after the collision? c) What is the value of distance d?Gayle runs at a speed of 4.15 m/s and dives on a sled, initially at rest on the top of a frictionless snow-covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they continue down the hill. What is their speed at the bottom of the hill if the total vertical drop is 15.0 m? Gayle's mass is 45.0 kg, the sled has a mass of 5.05 kg and her brother has a mass of 30.0 kg. m/sWhen some cars are advertised, they quote a "stopping distance" from some speed to zero. The mass of the car and this value of "some speed" give a measure of initial motion, but we aren't necessarily told the mass. Using the stopping distance, one can directly calculate what physical quantity provided by the brakes? A impulse B chemical potential energy C power D kinetic energy E force F velocity G work H acceleration I mass