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Q. A 9kg block is connected by a string over a light pulley to a 5kg block that is sliding over a flat table (i.e. the 9kg is pulling the 5kg off the table). If the Co-efficient of kinetic friction is 0.200, find the tension in the string?
Q. A 4.00-g bullet is moving horizontally with a velocity vector v = 340 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. The bullet passes completely through the first block (an inelastic collision) and embeds itself in the second one, as indicated in part b. Note that both blocks are moving after the collision with the bullet. The mass of the first block is 1150 g, and its velocity is +0.733 m/s after the bullet passes through it. The mass of the second block is 1530 g. (a) What is the velocity of the second block after the bullet imbeds itself? (b) Find the ratio of the total kinetic energy after the collision to that before the collision.
Write down the expression that shows the pressure
A flight attendant pulls her 70.10 N flight bag a distance of 258 m along a level airport floor at a constant speed. The force she exerts is 36.30 N at an angle of 52.0° above the horizontal.
A vertical spring (spring constant = 119 N/m) is mounted on the floor. A 0.390 kg block is placed on top of the spring and pushed down to start it oscillating in simple harmonic motion. The block is not attached to spring.
A block of the same weight as the meter stick is suspended from the stick, as shown, at a distance x from the wall. What is the minimum value of x for that the stick will remain in equilibrium.
While remodelling your garage, you need to temporarily splice, end to end, an 80 m long copper wire that is 1.130 mm in diameter with a 49.0 m long aluminium wire that has the same diameter. The maximum current in the wires is 2.00 A.
A car travelling at 120 strikes a tree. The front end of the car compresses and driver comes to rest after travelling 0.900.
What is velocity of insect after it has accelerated
In a simple atom, the electrons making transitions between outermost energy levels and the innermost energy levels give rise to photons with the reddest colours.
Find out kinetic energy of the merry-go-round
A bullet of mass 0.018kg traveling horizontally at a high speed of 290m/s embeds itself in a block of mass 4 kg that is sitting at rest on a nearly frictionless surface.
What is the frequency of light that has the wavelength in water of 788 nm if the refractive index for this light is 1.33.
A 1.20 liter flask contains a certain quantity of ideal gas at 305 K. after that an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.30 times its unique value. What is the final temperature.
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