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Q. After a day of testing race cars, you decide to take your own 1410 kg car onto the test track. While moving down the track at 10m/s, you uniformly accelerate to 31m/s in 10 s. What is the average net force that you have applied to the car throughout the 10 s interval?
Q. Two loudspeakers are placed 3.00 apart. They emit 510Hz sounds, in phase. A microphone is placed 3.20 distant from a point midway between the two speakers, where an intensity highest is recorded. How far should the microphone be moved to the right to determine the first intensity least?
A ball is thrown directly downward with an initial speed of 8.50 m/s, from the height of 29.5 m. After what time interval does it strike the ground.
You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is 188kg, and you require to exert a force of 347N to make it just begin to move. What is the coefficient of static friction between floor and refrigera..
Suppose two kids get on a 4 meter long teeter-totter. The one on the right creates a CW torque of 350 Newton-meters (Nm). Quite by coincidence, when the other kid sits at 1 meter from his end they balance perfectly. How much does second kid weigh.
illuminate the object with the flashlight. One way to produce artificial gravity in a space station is to spin it.
A 10.60 weather rocket generates a thrust of 220. The rocket, pointing upward, is clamped to the top of the vertical spring. The bottom of the spring, whose spring constant is 450, is anchored to the ground.
A skier starts from rest at the top of a hill that is inclined at 12.0° with the horizontal. The hillside is 180.0 m long, and the coefficient of friction between the snow and the skis is 0.0750. At the bottom of the hill, the snow is level and the c..
What is the target's speed just after the bullet emerges.What is the velocity v of the smaller fish before lunch.
A train 400m long is moving on a straight track with a speed of 84.30km/h. The engineer applies the brakes at the crossing and later the last car passes crossing with the speed of 17.7 km/h. suppose constant acceleration; conclude how long the tra..
As a function of time t, force component Fx that acts on a 3.00 kg ice block that can move only along the x axis. At t=0, the block is moving in positive direction of the axis, with a speed of 3.0 m/s. what are its (a) speed and (b) direction of trav..
A helicopter is ascending perpendicularly with a speed of 5.02 {rm m/s}. At a height of 115 {rm m} above the Earth, a package is dropped from the window.
How many liters of gasoline would give the same mechanical energy given that each liter provides 8.50x10^6 J of mechanical energy.
Make a drawing of this situation, and choose the best axes for x and y so that you have the least number of components.)
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