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An explosion breaks an object into two pieces, one of which has 1.5 times the mass of the other. If 7800 J were released in the explosion, how much kinetic energy did each piece acquire?
heavier piece
J
lighter piece
A 44.0 kg child is in a swing that is attached to ropes 1.60 m long. The acceleration of gravity is 9.81 m/s2. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions.
A 12 kg weather rocket generates a thrust of 250 N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 560 N/m, is anchored to the ground. What is the rocket's speed while the s..
a 1.5 kg box moves back and forth on a horizontal frictionless surface between two different springs. by how much will the box compress the weaker spring
q1. at one point in a pipeline waters speed is 3.30 ms and the gauge pressure is 4.00times104 pa. find out the gauge
Calculate the temperature at which a tungsten filament that has an emissivity of 0.50 and a surface area of 3.9 10-5 m2 will radiate energy at the rate of 35 W in a room
A uniform solid disk has a radius of R = 0.52 m and mass of M = 5.5 kg and is free to rotate about an axis through its center of mass. How many revolutions has the disk made at t = 8.2 seconds
A man whose mass is 80kg on the earth's surface is in a spacecraft at a height of 2 Earth radii above the earth's surface. At that height what is the acceleration due to gravity
q1. a rock is throwing from a tall building. the rock reaches its maximum height above the top of the building 1.77 s
A friend speeds by you in her spacecraft at a speed of 0.770 c. It is measured in your frame to be 4.30m long and 1.50m high. How many seconds elapsed on your watch when she saw 22.0s pass on hers
An insulated Thermos contains 131 cm3 of hot coffee at 82 °C. You put a 12g ice cube at its melting point to cool the coffee. By how many degrees has the coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though ..
A spring is used to propel a 0.400-kg hockey puck across level (frictionless) ice that becomes a rough (not frictionless) ramp inclined at 27°. If the puck reaches a maximum vertical height of 14 cm on the ramp, what distance does it travel along t..
A player kicks a ball from ground level with an initial velocity of 27.00 m/s at 30 degrees above the horizontal. What is the ball's range to one decimal place
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