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A car starts from rest and accelerates at a rate of 9 m/s2
for 4 seconds and then accelerates (brakes) at a rate of -3 m/s2for 2 seconds. How far did the car travel in 6 s?
The first sled is 30kg, connected with rope B to the second sled of mass 20 kg, connected with rope A to the first sled of mass 10 kg, which is being pulled by a rope of 137 N. Illustrate What is the tension in ropes A and B.
The force constant of a spring is 600 N/m and the unscratched length is 0.72 m. A 3.2-kg block is suspended from the spring. An external force slowly pulls the block down, until the spring has been stretched to a length of 0.86 m.
The mass of a neutron is about 1.7x10?27 kg. Suppose the mass of a neutron star is about 3.4*10^30 kg. How many neutrons does such a star contain
An electric toaster requires 1100 W at 110. V. What is the resistance, in Ohms, of the heating coil
we have two stationary point charges q13.6e-6 c and q26.0e-6 c seperated by 0.50 m.a what is the potential energy for
two charges are placed on the x axis. one of the charges q1 7.6 microc is at x1 3.4 cm and the other q2 -20 microc
A man pushes a box with a constant horizontal force. The mass of the box is 150 kg, the coefficient of kinetic friction between the box and the floor is 0.25, Find the work done by the man
A rock is thrown vertically upward with a speed of 14.0 . Exactly 1.00 later, a ball is thrown up vertically along the same path with a speed of 21.0
Two water waves meet at the same point, one having a displacement above equilibrium of 60 cm, what is the resulting displacement above equilibrium
A 4.3 meter long plank with a weight of 164 Newton is place on a dock with 1.4 meter of its length extended over the water. Find how far from the edge of the dock can the boy move until the plank is just on the verge of tipping
A 12.6kg runaway grocery cart runs into a spring with spring constant 230N/m and compresses it by 68.1cm. What was the speed of the cart just before it hit the spring
q1. a thermometer flashes the temperature in celsius and fahrenheit along with the time. if it flashes -4deg f what
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