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Q1. A hotel elevator ascends 270 m with a maximum speed of 5.0 m/s. Its acceleration and deceleration both have a magnitude of 1.7 m/s2.
Q2. An artillery shell is fired with the initial velocity of 300 m/s at 54.7° above the horizontal. To clear an avalanche, it explodes on the mountainside 55.0 s after firing. What is the x and y components of the shell where it explodes, relative to its firing point?
A person shoots a tennis ball out of a launcher. The tennis ball rises to a maximum height of 38 meters. a. What is the initial velocity of the tennis ball out of the launcher
A 4.1kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 3.3m/s2, find the force exerted by the rope on the bucket.
Explain how fast would it be moving after it had fallen a distance of 0.010 m? (Assume that the gravitational force is constant over the distance of the fall, and that the star is not rotating.)
An automobile of mass 1500 kg moving at 25m/s collides with a truck of mass 4500 kg at rest. What is the final velocity of the car after the collision
What is the magnitude of the electrostatic force the molecule exerts on it?
A double slit has two slits of width 0.650 mm separated by a distance between centres of 2.340 cm. How many interference fringes could be seen under the diffraction central maximum
question1a 100-kg athlete is performing vertical leap to test his leg strength. he leaves ground at 3.20 ms zooms
The drawing shows three particles far away from any other objects and located on a straight line. Find the net gravitational force
Two capacitors are connected in parallel with a 12 v battery. Each has plates of area 16 cm^2. The plate seperations are d1=2mm and d2=3mm. how much work is done to move the slab
Consider a cube of sides a = 4.60 m, as shown in the diagram below. Suppose that an electric field is present and is given by E = bxn, Calculate the magnitude of the total charge within the cube
What is the magnitude of the force (in N) the second child must exert to keep the door from moving? Assume friction is negligible.
A heat engine has a maximum possible efficiency of 0.800. If it operates between a deep lake with a constant temperature of 287.0 k and a hot reservoir, what is the temperature of the hot reservoir?
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