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if the car exerts a constant braking force how much longer will the stopping distance be if the car begins with a
a block of mass 20kg starts to slide from rest down a frictionless quarter circle track of radius 500m at the base of
while moving between a tall tree and a building a squirrel drops an acorn straight down a conveniently placed sensor on
1 the figure below shows three point charges that lie in the xy plane in a vacuum find the magnitude and direction of
a slingshot obeying hookes law is used to launch pebbles vertically into the air you observe that if you pull a pebble
a block of mass m starting from rest slides down a frictionless semicircular track from a height a as shown as it
1 how far in meters must a 100 kg pile driver fall if it is to do 14000 j of work2 a spring whose spring constant is
1 explain with the aid of a diagram why lines of force must be at right angles to equipotential lines2 under what
question 1 the atwood machine consists of two masses m1 and m2 connected by a massless inextensible string passingover
1 express 01324 in scientific notationanswer 1324sdot10-1in order to write number 01324 in scientific notation we
eratosthenes measured the circumference of the earth by noting that the sun is at an angle of 6adeg south of the
1 an electron is moved through a region with an electric potential defined by the equipotential lines shown position is
power dissipated in the upper branch r 3q of the circuit shown is twice the power dissipated in the 20- omega resistor
a 5 kg cannonball is launched at an angle of 40o from a 120 m tall hill it is pneumatically launched from rest to a
a 567 x108 asteroid comes within 8rearth earth is supposed to be written as a subscript of 8r of the surface of earth
a velocity selector is a device used to obtain a beam of charged particles ions moving in a straight line path all with
1 an electron of a hydrogen atom in an excited state makes a transition from the n 5 level to the n 2 levela does the
1-a does an electrically neutral particle that has mass interact with an electric field b does a charged particle
the voice coil in your stereo speakers woofer has 950 tight circular turns in the plane a diameter of 54 cm and a coil
the magnetic flux through a 28 ohm loop varies with time according to phit 4t2 120 e-03t where phi is measured in
2d kinematics projectile motion -a boy shoots a football from the top of a hill with velocity v0 the ball flies off the
the weight in the figure below hangs from a long board of negligible weight let theta 630o and w 480 nfind the
three ropes pull on a knot shown in figure 1 the knot is not accelerating a partially completed force diagram for the
1 draw a forcenbspf write down the components of the forcenbspfnbspin terms of the angle thatnbspfnbspmakes with a
1 determine the distance y to the centroid for the shaded area measured from the x axis if a is 27 in be sure to