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1. A wheel of radius 0.2 m starts from rest at t = 0 and rotates with constant angular acceleration about its axis to an angular velocity of 12 rad/s at t = 3 s.What is the angular acceleration of the wheel?
(a) 4 rad/s2(b) 15 rad/s2(c) 7.2 rad/s2(d) 36 rad/s2(e) 1.33 rad/s22. How many revolutions does the wheel make during the period of acceleration?
(a) 2.9(b) 3.7(c) 1.5(d) 8.6(e) 6.93. At t = 1.5 s, what is the centripetal acceleration of a point on the rim of the wheel?
(a) 4 m/s2(b) 15 m/s2(c) 7.2 m/s2(d) 36 m/s2(e) 1.33 m/s2
A particle falls in Earth's gravity. The force of air resistance is F = ??v1* v2 where v1 is the velocity, v2 is the speed, and ? is a constant. (The direction of the force is opposite to the velocity, and the magnitude of the force is ?v2.) If th..
A certain species of ionized atoms produces an emission line spectrum according to the Bohr model, but the number of protons Z in the nucleus is unknown. Obtain the next-to-the-longest wavelength in series of lines
A pulley hanging off the side of a building supports a 0.57 kg bucket on a rope. The pulley releases rope as the bucket is lowered to the ground. What is the distance to ground
The gas pressure drops during the process so the average is 600 kPa with an outside atmosphere at 100 kPa. Neglect the change in gas kinetic and potential energy, and find the needed change in the gas volume.
An artificial earth satellite has a circular orbit of radius 7.10 multiply.gif 106 m in an equatorial plane. Compute the (constant) speed of the satellite
An 6.70-cm-diameter, 300g sphere is released from rest at the top of a 1.60-m-long, 19.0 degree incline. What is the sphere's angular velocity at the bottom of the incline
an engineer wishes to determine the spring constant of a helical spring. she first puts enough weights on the spring to
A beam of light in air strikes the surface of a smooth piece of plastic having an index of refraction of 1.55 at an angle with the normal of 20°. The incident light has component E-field amplitudes parallel and perpendicular to the plane of incidence..
An underwater scuba diver sees the Sun at an apparent angle of 40.0° from the vertical. What is actual direction of the Sun
A mass m1 is attached to a wire of linear density 5.4 g/m, and the other end of the wire run over a pulley and tied to a wall as shown in Fig. The speed of transverse waves on the horizontal section of wire is observed to be 20 m/s. If a second ma..
A uniform rod of mass m and length l is kept vertical with the lower end clamped. What wil be the linear speed of the free end at this instant
When a potential difference of 160 V is applied to the plates of a parallel-plate capacitor, What is the spacing between the plates
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