5.0 kg and of the ball of mass m2 = 10 kg 1s the speed of the block of mass mj = when it has fallen a distance h = 1.0 m? The system starts from rest and neglect the friction between the block and the surface. m1
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- Professional baseball pitchers deliver pitches that can reach the blazing speed of 100 mph (miles per hour). A local team has drafted an up-and-coming, left-handed pitcher who can consistently pitch at 41.12 m/s (92.00 mph). Assuming a pitched ball has a mass of 0.1422 kg and has this speed just before a batter makes contact with it, how much kinetic energy does the ball have? Kball= Recall that the acceleration due to gravity is 9.81m/s2. How high would the ball need to be dropped from to attain the same energy as it did when it was pitched (neglect air resistance)? hball=A 15-g bullet is shot vertically into an 2-kg block. The block lifts upward 8.0 mm (see the figure).The bullet penetrates the block and comes to rest in it in a time interval of 0.0010 s. Assume theforce on the bullet is constant during penetration and that air resistance is negligible. The initialkinetic energy of the bullet is closest to: A) 21 J B) 0.16 J C) 14 J D) 0.0012 J E) 10 JA red 150 g toy car slides down a 40 degree frictionless ramp. At the bottom, just at it exists onto a horizontal part of the slide, it collides with a purple 400 g car at rest. How high should you make the water slide so that the red toy car gives the purple car a speed of 300 cm/s?
- I would appreciate any and all assistance with this question!A 15-g bullet is shot vertically into an 2-kg block. The block lifts upward 8.0 mm (see the figure). The bullet penetrates the block and comes to rest in it in a time interval of 0.0010 s. Assume the force on the bullet is constant during penetration and that air resistance is negligible. The initial kinetic energy of the bullet is closest to 171 0.0012 J. O 21 J. O 0.16 J.Doing some physics homework and am kind of stumped here!
- Two objects are connected by a light string passing over a light, frictionless pulley as shown in the figure below. The object of mass m₁ kg is released from rest at a height h = 5.60 m above the table. = 7.00 m2 m1 (a) Using the isolated system model, determine the speed of the object of mass m2 3.00 kg just as the 7.00-kg object hits the table. m/s (b) Find the maximum height above the table to which the 3.00-kg object rises. m7. According to a seated woman, a 67.7-kg man runs with his 32.4-kg dog toward a 20.2- kg child who is running toward the man. The man and dog's speed is 3.50 km/h, and the child's speed is 1.25 km/h. 1. According to the woman, what is the kinetic energy of the man-dog-child system? ( Ans: 48.5 J ) 2. According to the man, what is the kinetic energy of the man-dog-child system? ( Ans: 17.6 J )In a physics lab, the pitching speed of a student is determined by throwing a baseball into a box and observing the box's motion after the catch. A measurement of the distance the box slides across a rough surface of known coefficient of friction will allow one to determine the pre-impact speed of the pitched ball. If the pitched 0.25 kg ball hits a stationary 3.20 kg box and the ball and box together slide a distance of 2.40 meters across a surface with a coefficient of friction of 0.20 before coming to rest, then what is the pre-impact speed of the pitched ball?
- 10. A stationary block is released on a frictionless ramp at a height of 3.0 m. There are other hill heights along the ramp as shown in the figure. The hills have identical circular tops, and the block does not fly off any hill. If the mass of the block is 4 Kg, what would be the velocity as it passes hill (1)?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.)10. A child begins to slide down from the top of a frictionless semi circular mound of ice of radius 5m. At what height above the ground will the child loose contact with the ice?