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A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37.0o above the horizontal. If the mass of the box and the books is 40.0 kg, what is the normal force on the box?
a cannon fires a 9 lb projectile with an initial velocity of 60 ms at an angle of 15 degrees. assuming that air
There is force of F = 2.5N i + 3.5N j at r = 1.0m j - 4.0m k. What is the angle between the force vector and the radius vector
After falling from rest from a height of 35 m, a 0.45 kg ball rebounds upward, reaching a height of 25 m. If the contact between ball and ground lasted 1.8 ms, illustrate what average force was exerted on the ball?
An eagle is flying horizontally at 4.8 m/s with a fish in its claws. It accidentally drops the fish. How much time passes before the fish's speed doubles
A 14.4 kg curling rock is released with a speed of 1.78 m/s and slides to a stop in 22 meters. What force of friction acts on the rock
Falling light. According to general relativity and the equivalence principle, light is bent by gravity. Determine the time it takes for the light to strike the ground
An isolated conductor of arbitrary shape has a net charge of +1.1 multiply.gif 10-5 C. What is the charge on the cavity wall
A fuzzy die (m = 0.2 kg) hangs from the ceiling of a car
To practice Problem-Solving Strategy 21.1 Coulomb's Law. Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 3.7cm. Two of the particles have a negative charge: q1 = -7.7nC and q2 = -15.4nC..
Decide the electric field strength at a point 1.00 cm to the left of the middle charge shown in Figure P15.10. If a charge of -2.70 µC is placed at this point, what are the magnitude and direction of the force on it?
A bullet is fired at an angle of 60o with an initial velocity of 200.0 m/s. Explain how long is the bullet in the air? What is the maximum height reached by the bullet?
The nucleus of the hydrogen atom has a radius of about 1.1 Ã- 10-15 m. find the volume of the nucleus
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