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A car traveling on a road at a speed of 70km/h exits onto an ice-covered exit ramp. wishing to stop , he applies his brakes until his automobile comes to rest .knowing that the magnitude of the total acceleration of the automobile cannot exceed 10 ft/s^2, determine the minimum time require for the automobile to come to rest and the distsnce it travels on the exite ramp during that time if the exit ramp (a) is straight (b) has a constant radius of curvature of 800 ft.
Solve each part assuming that the driver applies his brakes so that dv/dt , during each time interval , (1)remains constant ,(2) varies linearly ?
A pond with a flat bottom has a surface area of 698 m2 and a depth of 3.0 meter. Determine the rate at which energy is transferred by conduction from the surface to the bottom of the pond
Your spaceship lands on a planet that has a gravitational force whose magnitude is 1/5th of Earth's gravitational force. If you weigh 800 N on Earth
A cord is used to lower verically a block of mass M a distance d at a constand downward acceleration of g/4. Find the work done by the cord on the block
An air core solenoid is used as an inductor in an oscillating LC circuit with a 1.50 \muF capacitor. The solenoid had a diameter of 6.40 cm, Find the number of turns in the solenoid
A total charge Q = 2.7 mC is distributed uniformly over a quarter circle arc of radius a=9.3 cm, What is lamda the linear charge density along the arc
Two cars start from rest at a red stop light, When the light turns green, both cars accelerate forward, finally catching the blue car just as the blue car comes to a stop, How fast is the blue car going 9 seconds after it starts
A girl delivering newspapers travels 1 blocks west, 2 blocks north, and then 6 blocks east. What is her resultant displacement
A basketball player has free throws from the foul line. The center of the basket is a horizontal distance of 4.21 m from the foul line and is a height of 3.05 m above the floor. For the first free throw he shoots the ball at an angle of 35 degrees ab..
In a test race, an automobile must complete a 10 km run in 4 minutes. If the car goes at 36 m/s for the first 5 km, What must be its speed for the second 5 km
If a negative charge is initially at rest in an electric field, will it move toward a region of higher potential or lower potential? What about a postive charge? How does the potential energy of teh charge change in each instance?
You have an inertia of 52 kg and are standing at rest on an iced-over pond in your skates. Suddenly, your 60-kg brother skates in from the right with x component of velocity -4.8 m/s and collides elastically with you. What is the siblings' relative ..
A rocket accelerates upwards from rest at 20 m/for 4 seconds then its engine shuts off. find the maximum height reached by the rocket
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