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Q. On a spacecraft two engines fire for a time of 585s. One gives the craft an acceleration in the x direction of ax = 5.1m/s2, whilst the other produces an acceleration in the y direction of ay = 7.3m/s2. At the end of the firing period, craft has velocity components of vx = 3810 m/s and vy = 4406 m/s. Find out the magnitude and direction of the initial velocity. State the direction as an angle with respect to the +x axis.
However, the current increases by just 0.11 A when R1 is removed, leaving R2 connected across the battery. Find (a) R1 and (b) R2.
A 1040 kg car carrying four 80 kg people travels over a rough "washboard" dirt road with corrugations 2.0 m apart that causes the car to bounce on its spring suspension. The car bounces with maximum amplitude as its speed is 21 km/h. The car now stop..
In one design, the large spring with spring constant 2.0×10^4 was placed behind the cannon. The other end of the spring braced against a post that was firmly anchored to the ship's frame.
Besides the gravitational force, a 3.25-kg object is subjected to one other constant force. The object starts from rest and in 1.20 s experiences a displacement of (4.10 - 3.30) m, where the direction of is the upward vertical direction. find out ..
If an average frequency emitted by a 200,-,rm W light bulb is 5.00 times 10^{14} , {rm Hz}, and 10.0 percent of the input power is emitted as visible light, approximately how many visible-light photons are emitted per second .
What is the ratio of the amplitude of the damped oscillation
What are the d irections of electric field
Find out parametric equations for the shell's trajectory relative to the coordinate system. What is the maximum distance at which these headlights could be resolved as separate points of light on a photograph taken with a camera whose aperture has a ..
A proton has a mass of 1.67 x 10^-27 kg and a charge of 1.60 x 10^-19 C. What is the gravitational force on a single proton at Earth's surface.
A loudspeaker of mass 21.0 {rm kg} is suspended a distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? plan a ray diagram to support your answer.
Coherent light with wavelength 595 nm passes by two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 {rm m} from the slits. The first-order bright fringe is a distance of 4.84 {rm mm} from the center of th..
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