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A gardener pushes a 20kg lawnmower whose handle is tilted up 37degrees above horizontal. The lawnmower's coefficient of rolling friction is 0.20. How much power does the gardener have to supply to push the lawnmower at a constant speed of 1.4m/s ? Assume his push is parallel to the handle.
A parachutist descending at a speed of 13.4 m/s loses a shoe at an altitude of 54.2 m. Illustrate what is the velocity of the shoe just before it hits the ground? The acceleration of gravity is 9.81 m/s2.
What is the magnitude of the acceleration of the speck of clay on the edge of a potter's wheel turning at 50 (revolutions per minute) if the wheel's diameter is 38.0 cm.
A 2.0-cm-tall object is 20 cm in front of a converging lens that has a 10 cm focal length. Calculate the image position and height
A wheel turns with a constant angular acceleration of 0.600rad/s^2. Through how many revolutions does the wheel turn in this interval
A crate pushed along the floor with velocity slides a distance after the pushing force is removed. what distance does the crate slide before stopping
A stone is released from a tower in a vacuum. It takes 4.50s to reach the ground below. Find the height of the tower
An astronaut is traveling in a space vehicle that has a speed of 0.485c relative to Earth. The astronaut measures his pulse rate at 77.5 per minute. What pulse rate does the Earth observer measure
Your 12-kg baby sister pulls on the bottom of the tablecloth with all her weight. On the table, 59cm from each edge, is a 5.8-kg roast turkey. What's the turkey's acceleration
A force in the negative direction of an x axis is applied for 34 ms to a 0.40 kg ball initially moving at 14 m/s in the positive direction of the axis. What is the direction of the impulse on the ball
Determine the flux of particles escaping from the exobase of Earth's atmosphere using a number density at the exobase of 10^5 particles/cm^3 and a temperature of 700K.
A hydraulic jack is made with a small piston 1.4 cm in diameter that is used to move a large piston 5.8 cm in diameter. how heavy a load can he lift with the jack
A charge of 2.50 is held fixed at the origin. A second charge of 2.50 is released from rest at the position (1.25 , 0.570 ). If the mass of the second charge is 2.75 , what is its speed when it moves infinitely far from the origin
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