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While a roofer is working on a roof that slants at 39.0? above the horizontal, he accidentally nudges his 90.0N toolbox, causing it to start sliding downward, starting from rest.
If it starts 4.70m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 21.0N?
You drop 500 g of ice at -35oC into a bucket of water (1200 g) at 45oC. Find the final temperature of the system
Explain how many pellets must be added to 450 g of water that is initially at 20.0°C to make the equilibrium temperature 25.0°C? Neglect any energy transfer to or from the container.
A box of mass 38.5 kg is sitting on a horizontal table top with a coefficient of kinetic friction between the box and the surface of 0.49. Find the magnitude of the acceleration of the box on the table
The brakes of a truck cause it to slow down by applying a retarding force of 4520 N to the truck over a distance of 1150 m
A 14 g ball of clay travelling east at 3.0 m/s collides with a 30 g ball of clay travelling north at 2.00m/s. What are the speed and the direction of resulting 44 g ball of clay.
When landing after a spectacular somersault, a 40.0 kg gymnast decelerates by pushing straight down on the mat. Calculate the force she must exert
A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9 x 10^7 m. If the satellite circles the planet once every 2.1 h in the larger orbit, what is the mass of the planet
The position vector of a particle of mass 2.00 kg as a function of time is given by r =(2ti+3t^2j), Determine the angular momentum (in kg-m^2/s) of the particle about the origin at t = 4 s
A car of mass 2200 kg collides with a truck of mass 4800 kg, and just after the collision the car and truck slide along, stuck together. find the velocity of the stuck-together car and truck just after the collision
0.023mol of a diatomic gas, with initial temperature 25?C, How much heat is added during this process
A tennis ball of mass 57 g travels with velocity m/s toward a wall. After bouncing off the wall, the tennis ball is observed to be traveling with velocity m/s.
Find out that the value of the gravitational field strength
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