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Q. A flea pulls on a puck with force 7 microN at an angle of 30?. Another flea pulls on the puck with force 2 microN at an angle of -60?.
1) What is the magnitude of the net force on the puck? (I got 7.28 uN)
2) At what angle is the net force? (I got about 14.07 deg)
3) A third flea decides to pull the puck so that it will stop accelerating. What is the magnitude of the force with which it should pull and in what direction should the flea pull so that the puck stops accelerating?
A ballplayer catches a ball 2.75 seconds after throwing it vertically upward. With what speed did he throw it? Calculate the final & resultant velocity and acceleration.
Two boxes A and B are connected to each end of a light vertical rope. A constant upward force 80.0 is applied to box. Starting from rest, box descends 10.4 in 3.40. The tension in the rope connecting the two boxes is 37.0
How far from the point of the drop will the rock hit the ground.
Determine the tension in each cable if boat has a mass of 490 kg and the angle of each cable is 50 degrees from the horizontal and the boat is being momentarily held at rest. Evaluate this to the tension when the boat is raised and held at rest so th..
At the beginning of the interval the astronaut is moving toward the right along the x-axis at 15.40, and at the end of interval she is moving toward the right at 5.40.
Heather and Jerry are standing on a bridge 51 above a river. Heather throws a rock straight down with a speed of 12. Jerry, at accurately the same instant of time, throws a rock straight up with the same speed. Ignore air resistance.
A space station, in the form of a wheel 100m in diameter, rotates to supply an "artificial gravity" of 3.7m/s2 for persons who walk around on inner wall of the outer rim. Find out the rate of rotation of the wheel (in revolutions per minute) that ..
The aurora is caused when electrons and protons, moving in earth's magnetic field of 5x10^-5 T, collide with molecules of the atmosphere and cause them to glow. What is the radius of the circular orbit for (a) an electron with speed 1.0×10^6 and (b) ..
a car with a mass 1865 kg is travelling west and slows down uniformly to 8.5 m/s over a distance of 108 m. calculate the initial speed of the car if the required braking force is 7525 N
Phonology: All the data for this problem come from a conservative dialect of Vèneto, a Romance language spoken in northern Italy near the city of Padua.
define the initial velocity of the ball.
A small car is pushing a larger truck that has a dead battery. The mass of the truck is twice as large as the mass of car. At one instant of time the car and truck both have an acceleration of 3.5 m/s2. Which of the following statements is true? D..
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