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A curve in a highway has radius of curvature 120 m and is banked at 2.8°. On a day when the road is icy, what is the safest speed to go around the curve?
evaluate what value of the distance d should a driver locate his car if he wishes to stay on a circular path without depending on friction?
A barefoot field-goal kicker imparts a speed of 26 m/s to a football at first at rest. If the football has a mass of 0.24 kg and the If the football has the mass of 0.24 kg and the time of contact with the ball is 0.037 s, what is the force exerte..
A tennis ball is hit with a vertical speed of 30 m/s and a horizontal speed of 25 m/s. How long will the ball remain in the air? How far will it travel horizontally during this time?
Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 680m to be the other plate. Assume the surface area of the cloud to be the same as the area of a square that ..
A spaceship moves past you at speed v. You measure the ship to be 287 m long, whereas an astronaut on the ship measures a length of 380 m. Find out v.
A cat is trying to jump onto a countertop that is 1m tall from 0.3m away. The cat's initial jump speed (magnitude of the total initial velocity) is 10m/s
A trolley that moves along a horizontal beam is acted upon by two forces as shown. (a) Knowing that a 5 25°, determine by trigonometry the magnitude of the force P so that the resultant force exerted on the trolley is vertical. (b) What is the cor..
A projectile is launched with an initial speed of 50 m/s at an angle of 35° above the horizontal, What is the projectile's velocity at the highest point of its trajectory
You are given a spherical mirror and wish to determine its properties. You place an object on its axis, Find the mirror\'s focal length
A black wood stove with surface area 4.6 m^2 is made from cast iron 4.0 mm thick. What is the rate of heat loss by radiation from the stove
If the average frequency emitted by a 200,-, rm W light bulb is 5.00 times 10^ {14}, {rm Hz}, and 10.0 percent of the input power is emitted as visible light, about how many visible-light photons are emitted per second.
Determine how long it would take an astronaut to fall from a height of 2 meters on the Moon. Compare this time to the time it would take the astronaut to fall the same 2 meters on the Earth. Also, compare the time to the time it would take on the ..
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