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A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 5.73 m/s. The car is a distance d away. The bear is 21.4 m behind the tourist and running at 8.97 m/s. The tourist reaches the car safely. What is the maximum possible value for d?
A double speed trap is set up on a freeway. One police cruiser is hidden behind a billboard, and another is some distance away under a bridge. As a sedan passes by the first cruiser, its speed is measured to be 99.7 mph.
A block is placed at the end of the frictionless ramp and is pulled up the ramp through a solid ball on the end of a string that passes over a frictionless pulley that does not affect the motion of the block or ball. The ramp is 3.40 meters long and ..
What is a vertical velocity of the ball
A circular parallel-plate capacitor with a spacing of 3.2 mm is charged to produce a uniform electric field with strength of 1.50 multiplied by 106 N/C. What plate radius is required if the stored charge is -15.6 µC.
Assume that the net horizontal force is due to rolling friction only and take free-fall acceleration to be = 9.80 .What is the coefficient of rolling friction for the tire under low pressure.
Transvers waves: Speed of wave on streatched string. Two steel wires are stretched with the same tension. The first wire has a diameter of 0.610 mm and the second wire has a diameter of 0.910 mm
A current of 2.5 a runs through 20 circular wire loops of diameter 10 cm. What is the magnetic field magnitude and direction at the center of the loops? (Show the derivation of any formula that you use.)
When the cannon is fired, the ball moves 15.3 cm through the horizontal barrel of the cannon, and there is a constant frictional force of 0.0322 N between the barrel and the ball. Illustrate at what point does it have its max speed?
A toy of mass 0.155 kg is undergoing SHM on the end of a horizontal spring with forces constant 305 N/m. When object is a distance 1.20×10-2 m from its equilibrium position, it is observed to have the speed of 0.255 m/s.
What is the wavelength of the waves emitted by source? What is the difference in frequency between the directly radiated waves and the waves reflected from a whale traveling straight toward the ship at 4.95 ? Assume that the ship is at rest in the..
A 20 g ball is fired horizontally with initial speed v_0 toward a 110 g ball that is hanging motionless from a 1.10 m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle t..
A 0.449 kg ice puck, moving east with a speed of 2.91 m/s, has the head-on collision with a 0.846 kg puck initially at rest. Assume a perfectly elastic collision, what will be the speed and direction of each object after the collision.
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