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Q. A 1.52 wide, 1.50 high, 1500 car hits a very slick patch of ice while going 21.0 .If friction is neglected, how long will it take until the car's speed drops to 14.0 ?
Q. A ranger in a national park is driving at 49 km/h when a deer jumps onto the road 66 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -2.00 m/s2. What is the maximum reaction time allowed if the ranger is to avoid hitting the deer?
A crate is pulled by a force (parallel to the incline) up a rough incline. The crate has an initial speed of 1.5m/s. The crate is pulled a distance of 7.5 m on the incline by a 150 N force. The acceleration of gravity is 9.8m/s² mu=0.15
A glass window pane is exactly 20 cm by 36 cm at 10oC. By how much has its area increased as it temperature is 33oC, assuming that it can expand freely? Take the coefficient of thermal expansion for the glass to be exactly 9 x 10-6/Co.
What is the tension in the cord in the original situation. A cube of ice is taken from the freezer at -9.3°C and placed in a 95 g aluminum calorimeter filled with 297 g of water at room temperature of 20°C. The final situation is observed to be all..
one end of a uniform beam of 222N is hinged to a wall, the other end is supported by a wire that makes angles of 30 with both wall and beam, find out the tension in the wire and horizontal and vertical componentes of the force od the hinge on the ..
A 0.174kg softball is pitched horizontally at 26m/s. the ball moves in the opposite direction at 38m/s after it is hit by the bat.
A professor's office door is 0.90 wide, 2.00 high, 4.00 thick; has a mass of 30, and pivots on frictionless hinges. A "door closer" is attached to door and the top of the door frame. When the door is open and at rest, the door closer exerts the torqu..
A friend of yours is loudly singing a single note at 411 Hz while racing toward you at 25.5 m/s on a day when the speed of sound is 341 m/s.
Two stationary positive point charges, charge 1 of magnitude 3.10 nC and charge 2 of magnitude 1.74 nC, are separated by a distance of 36 cm. An electron is free from rest at the point midway between the two charges, and it moves along the line con..
Find out the magnitude of the charge on the moving particle. The baby soon learns to bounce with utmost amplitude and minimum effort by bending her knees at what frequency.
A hawk flies in a horizontal arc of radius 14 m at a constant speed of 5 m/s. (a) Find out its centripetal acceleration. (b) It continues loftly along the same horizontal arc but increases its speed at the rate of 1 m/s2. Find out the acceleration..
A proton moves perpendicularly to a uniform magnetic ?eld B with a speed of 1.9 × 10 ^7 m/s and experiences an acceleration of 8 × 10 12 m/s 2 in the positive x direction when its velocity is in the positive z direction. The mass of a proton is 1...
An asteroid is discovered heading straight toward Earth at 13 . An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 , after which the asteroid is moving at 29 to its original path at a speed of 18..
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