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you accelerate your car starting from rest. while the car is increasing its speed, the frictional force acting from the road on the tires? A) directed backword, opposing the motion B)IS directed vertically uo, C) is directed forward, in the direction of motion, D) has nothing to do with the acceleration of the car
You have just built a house out in the country and it comes to your attention that you need to install a lightning rod. Being naturally curious you ask a hardware salesperson how lightning rods work and they accurately tell you.
A tennis ball is hit with a vertical speed of 30 m/s and a horizontal speed of 25 m/s. How long will the ball remain in the air? How far will it travel horizontally during this time?
If a car traveling at 66 km/h will skid 22 m when its brakes lock, how far would it skid if it is traveling at 120 km/h when its brakes lock.
What is the net force exerted on the skier, assume his acceleration is constant.
A speedboat moving at 30 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of negative 3.5 m/s^2 by reducing the throttle. How long does it take boat to reach the buoy.
An unstrained horizontal spring has a length of 0.34 m and a spring constant of 290 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes.
An open-pit coal mine consumes 71hectares of land, down to a depth of 23m, each year. What volume of earth, in cubic kilometres, is separate in this time.
If the perceived frequency becomes constant at 440 Hz, what is terminal speed at the paratrooper? Take the speed sound in air to be 343 m/s and assume the paratrooper always remains below the helicopter.
How many packs of shingles can the contractor lift before he begins to slide down the roof assuming the following Contractor weights and values for the coecient of static friction exists between the contractor and the roof.
What angle does water surface make with the horizontal
A container of volume 23 cm3 is initially filled with air. The container is after that evacuated at 0oC to a pressure of 30 mPa. How many molecules are in the container after evacuation if we suppose that air is an ideal gas.
What is the charge on each
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