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Q. A motorcycle officer hidden at an intersection observes a car driven by an oblivious driver who ignores a stop sign and continues through the intersection at constant speed. The police officer takes off in pursuit 1.78 s after the car has passed the stop sign. She accelerates at 4.5 m/s2 until her speed is 103 km/h, and then continues at this speed until she catches the car. At that instant, the car is 1.2 km from the intersection.
(a) How long did it take for the officer to catch up to the car?
(b) How fast was the car traveling?
The radius of Venus's orbit is 0.72 times that of Earth's orbit. How much stronger is the Sun's gravitational field at Venus than at the earth.
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..
find the magnitude of the initial acceleration. At what height above the surface of the earth does the balloon have a speed of 7.30 m/s.
An inflated rubber balloon is rubbed with the wool cloth until an excess of 1.50 multiplied by 109 electrons is on the balloon. What is the magnitude of the charge on the balloon.
A 10 runaway grocery cart runs into the spring with spring constant 230 and compresses it by 65. What was the speed of the cart right before it hit the spring.
A grocery cart with mass of 12kg is being pusch at constant speed up a flt 15 degree ramp by force which act at an angle 17 degree below the horizontal line.
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.
Find out the height from which you would have to drop a ball so that it would have a speed of 9.7 m/s just before it hits the ground.
Two bicycle tires are set rolling with the equivalent initial speed of 5.0 m/s along a long, straight road, and distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 {rm psi} and goes the dist..
A student of weight 665 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude of the normal force N on the student from seat is 566 N.
It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes.
A circuit contains six 240 ohm lamps with 60 W bulbs and a 10 ohm heater connected in parallel. the voltage across the circuit is 120 V. If the circuit has a fuse rated at 12 A, would it melt if everything is on.
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