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A roller coaster has a vertical loop with radius 27.6 m. With what minimum speed should the roller coaster car be moving at the top of the loop so that the passengers do not lose contact with the s
On an airless moon, you drop a golf ball of mass 106g out of a skyscraper window. After it has fallen 125 meters, it is moving at 19.0 m/s. What is the rate of freefall acceleration on this moon?
If the initial speed imparted to the arrow is 74.6 m/s, what angle should the arrow make with the horizontal as it is being shot?
A car accelerates uniformly from rest and reaches a speed of 18 m/s in 10.00 s. If the diameter of a tire is 58.0 cm, ?nd (a) the number of revolutions the tire makes during this motion, assuming t
A crude, symmetric handheld microscope consists of two converging 20 D lenses fastened in the ends of a tube 27 cm long. what is the "tube length" (distance between the foci of the two lenses) of t
A 55.0 g bullet is fired vertically with an initial velocity of 123 m/s from an initial height of 25.0 metres. What is its velocity at its highest point of travel? What maximum height does it reach
A newly discovered asteroid is found to have a circular orbit, with a radius equal to 20 times the radius of the Earth's orbit. How long does this asteroid take to complete one orbit around the Sun
Find the (a) magnitude and (b) direction of A - B. (Give the direction as a positive angle with respect to due east). Find the (c) magnitude and (d) direction of B - A.
A rifle bullet with a mass of 15.0 g traveling toward the right at 278 m/s strikes a large bag of sand and penetrates it to a depth of 24.8 cm. Determine the magnitude and direction of the friction
Julia's parents and friends don't smoke, but they say nothing to discourage her from doing so. According to the observational learning theory, will Juan or Julia be more likely to start smoking?
A planet of mass 6.00 1025 kg is in a circular orbit of radius 2.00 1011 m around a star. The star exerts a force on the planet of constant magnitude 5.03 1023 N. The speed of the planet is 4.09 10
The rod unable to flex further, a 1.3 kg trout is just able to snap this leader. How much time would it take this trout to accelerate from rest to 5.0 m/s if it were free of the line?
What is the mean number density of galaxies within the half mass radius? Suppose the typical physical cross section of a galaxy is 10^-3 Mpc^2.
A grasshopper hops down a level road. On each hop, the grasshopper launches itself at angle theta_0 = 45{rm ^circ} and achieves a range R = 1.2 {rm m}.What is the average horizontal speed of the gr
It is traveling at 5.00 m/s when it reaches her. What was the speed of the ball when it left your hand if you released it at a height of 1.10m.
The magnitude of vector is 40.0 units and points in the direction 300° counterclockwise from the positive x-axis. Calculate the x-component of this vector.
A 2.00-m tall basketball player is standing on the floor 10.0 m from the basket. If he shoots the ball at a 40 degree angle from the horizontal, at what initial speed must he throw the ball so that
Two horizontal forces, 225N and 165N are exerted on a canoe. If these forces are applied in the same direction, find the net horizontal force on the canoe
A 89 kg man in a 7.0 kg chair tilts back so that all the weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area with a radius of 1.0 cm,
A truck travels beneath an airplane that is moving 100 km/h at an angle of 53? to the ground. How fast must the truck travel to stay be- neath the airplane?
Two blocks with masses and hang one under the other. For this problem, take the positive direction to be upward, and use for the magnitude of the acceleration due to gravity.
A uniform bar is propped against a very slick vertical wall as shown. The force of static friction between the upper end of the bar and the wall is negligible, but the bar remains at rest, in equili
A crate is sliding down a ramp that is inclined at an angle of 45.5° above the horizontal. The coefficient of kinetic friction between the crate and the ramp surface is 0.672. Find the accelera
In a circuit, a resistor is only element that has resistance. Find the amount of "time" passes btw the max energy(Uc) in capacitor and max energy stored in inductor(U L)