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A kid sits in a sled on a horizontal snowy surface. The combined mass of the kid and the sled is 34 kilogram. The kinetic coefficient of friction is 0.39. Initially the kid and her sled are at rest. After you pull the sled 20 meter the velocity of the sled is 1.5 meter per second. Find how much total mechanical work (J) did you do as you pulled the sled and kid 20 meter?
The distance to the moon can be found with the help of mirrors left on the moon by astronauts. calculate the distance from the earth to the moon
When cylinder-head bolts in an automobile engine are tightened, the critical quantity is the torque applied to the bolts. Why is the torque more significant than the actual force applied to the wrench handle?
light of wavelength 558.0 nm is incident on a narrow slit. the diffraction pattern is viewed on a screen 78.5 cm from
Suppose that a person singing in the shower is producing1.34 mW of sound power. Some of the soundis reflected from the floor and ceiling. The intensity of this reflected sound at a distance of 3.01 mfrom the source is 4.40 10-6 W/m2.
A 851-kg car stopped at an intersection is rear-ended by a 1760-kg truck moving with a speed of 17.5 m/s. find the final speed of both vehicles after the collision
A constant force, F = (4.55, ?3.79, 2.10) N,acts on an object of mass 17.4 kg, What is the total work done by this force
A 2.0 kg box of running shoes slides on a horizontal frictionless table and collides with a 1.0 kg box of ballet slippers initially at rest on the edge of the table, at height h = 0.41 m. find their kinetic energy just before they strike the floor
a solenoid with n1800 turnsm and a current i1 3a is filled with a paragmagnetic material at t1 250 k. a second
5.00 g of ice at -10.0 celsius are added to 20.0 mL of hot coffee at 60.0 celsius, What is the final temperature of the coffee
Derive the equation for the linear acceleration of a falling mass m suspended by a string from the rim of a uniform disk of mass M and radius R that is free to rotate without friction about its principal axis. 2. If the hanging mass is doubled, what ..
what is bragg scattering angle ? first orderfor an electrons beam scattered diffracted from the surface of ni crystal
Two buckets of nails are hung one above the other and pulled up to a roof by a rope. Each bucket of nails has a mass of 5.0kg. The action-reaction force between the buckets is 60N. Calculate the acceleration and the force applied by the worker lif..
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