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Q1.A grinding wheel, initially at rest, is rotated with constant angular acceleration of 3.73 rad/s2 for 9.03 s. The wheel is then brought to rest, with uniform deceleration, in 13.6 rev. Find the magnitude of the angular deceleration required to bring wheel to rest.
Response in units of rad/s2.
Q2. A 75-kg water skier is being pulled by a nylon (Young's modulus 3.7 x 109 N/m2) tow rope that is attached to a boat. The unstretched length of rope is 10 m and its cross-section area is 1.7 x 10-5 m2. As the skier moves, a resistive force (due to the water) of magnitude 130 N acts on her; this force is directed opposite to her motion. What is the change in length of the rope whilst the skier has the acceleration whose magnitude is 0.65 m/s2?
Q3. A bumper car with mass m1 = 101 kg is moving to the right with a velocity of v1 = 4.1 m/s. A second bumper car with mass m2 = 95 kg is moving to left with a velocity of v2 = -3.7 m/s. The two cars have an elastic collision. Imagine the surface is frictionless.
In a photoelectric-effect experiment, the maximum kinetic energy of electrons is 3.2eV . When the wavelength of the light is increased by 50% , What is the work function of the cathode
A ball is thrown directly upward with an initial velocity of 10 m/s. how long is the ball in the air
Three point charges are on the x-axis. The first is located at -4meters and has a charge of -6 coulombs. compute the net force on the charge at the origin
A car and driver have a combined mass of 100 kg. What is the force of the hill on the car as it passes over the top
A 3.40-kg aluminum ball has an apparent mass of 2.10 kg when submerged in a particular liquid. Calculate the density of the fluid
A bicycle wheel of radius 0.4 m is spinning at a rate of 65 revolutions per minute. find the centripetal acceleration of a point on the edge of the wheel
Calculate the numerical value of the capacitance of this capacitor after glycerin at 20?C completely fills the volume between the plates
find the childs speed at the lowest point.An elevator has mass 610 kg, not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 20.0 m (five floors) in 17.0 s and it is driven by a motor that can provi..
A string %uFB01xed %uFB01xed at both ends is 1 m long. It resonates in its second harmonic at a frequency of 55 Hz. What is the speed of transverse waves on the string
An individual is running around a turn with an 11 m radius at 3.75 m/s. What is the runner's centripetal acceleration
What is the maximum speed of the ball.
IF Earth's orbit were suddenly to become much more eccentric. keeping orbital semimajor axis as is, Is our solar system typical in having all of its planets in very low eccentricity orbits
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