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A skater of mass 81.5 kg initially moves in a straight line at a speed of 5.30 m/s. The skater approaches a child of mass 35.0 kg, whom he lifts on his shoulders. Assuming there are no external horizontal forces, what is the skater's final velocity?
You throw a glob of putty straight up toward the ceiling, which is 3.00m above the point where the putty leaves your hand. What is the speed of the putty just before it strikes the ceiling
The driver of a 1740 car traveling on a horizontal road at 110 suddenly applies the brakes. How many meters does it travel before stopping under these conditions
A factory worker accidentally releases a 200 kg crate that was being held at rest at the top of a ramp that is 3.9 m long, How fast is the crate moving as it reaches the bottom of the ramp
The drag force on an object depends on the dimensionless drag coefficient, the density of air, the object velocity, and the frontal area of the object. By only considering units obtain a relation for the drag force
A uniform 3.15-kg rope 25.6 m long lies on the ground at the top of a vertical cliff. What was the change in potential energy of the rope during this maneuver
An electron moving parallel to the x axis has an initial speed of 3.70x10^6 m/s at the origin. Calculate the potential difference between the origin and that point.
If John Glenn weighed 640 N on Earth's surface, a) how much would he have weighed if his Mercury spacecraft had (hypothetically) remained at twice the distance from centre of Earth? b) Why is it said that an astronaut is never truly "weightles".
A simple pendulum is 0.50m long. At t=0 it is released from rest starting at an angle of 10 degrees.Ignoring friction, what will be the angular position of the pendulum
An air conditioner draws 12 A at 220 V ac. The connecting cord is copper wire with a diameter of 1.450 mm. how much power does this air conditioner draw
an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley, What are the masses of each disk
A two-slit pattern is viewed on a screen 1.08 m from the slits. what is the total width of the central bright fringe
starting from rest a car travels 1350 m in 1 minute. it accelerated at 1 m/s^2 untill it reached its cruising speed. what was its cruising speed
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