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Q. A car is traveling north at 17.7 m/s. After 12s its velocity is 14.1 m/s in the same direction. Find the magnitude and direction of the car's average acceleration.
Q. A 206-kg crate is pushed horizontally with a force of 703 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
A basketball player grabbing a rebound jumps 70 cm vertically. How much total time (ascent and descent) does the player spend (a) in the top 11.9 cm of this jump and (b) in the bottom 11.9 cm.
On an amusement park ride, passengers are seated in the horizontal circle of radius 6.5 m. The seats begin from rest and are uniformly accelerated for 24 seconds to a maximum rotational speed of 1.4 rad/s.
Determine the position of the GPS satellite relative to and from the center of the earth and ratio of clock rates on a GPS clock in orbit and one on the surface of the earth.
If the velocity of the car is increased to 50 km/ hour, what is its kinetic energy. if the velocity is improved to 75 km/ hour, what is its kinetic energy.
Calculate the magnitude of the electric field at one corner of a square 1.43
If water at 15°C is flowing through a 3cm diameter pipe with a velocity of 50 cm-1, calculate the Reynolds number. Is the flow turbulent or laminar?
A motor boat haeds due east at 5 m/s acorss a river that flows toward the south at 5 m/s. If the river is 125m wide, how longs does it take the boat to cross the river.
A 10 cm high object is situated 25 cm in front of a convex mirror that has a radius of curvature of 1.00 102 cm.
An infinite line of charge has linear charge density 5.50x 10-12 C/m. A proton (mass 1.67x 10-27 kg, charge +1.60 10-19 C) is 18.0 cm from line and moving directly toward the line at 1.20 x10^3 m/s. How close does the proton get to the line of char..
The potential at the center of a uniformly charged ring is 44kV, and 15.0 cm along the ring axis potential is 30kV. Find the ring's radius and its total charge.
Presume the child remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or less than the speed you calculate.
A person driving her car at 49 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection .
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