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Q1. A 1590 kg car starts from rest on a horizontal road and gains a speed of 61 km/h in 30 s (a) what is its kinetic energy at the end of the 30 s?
(b) What is an average power required of the car throughout the 30 s interval?
(c) What is an instantaneous power at the end of the 30 s interval, assuming that the acceleration is constant?
Q2. An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +7.35 x 105 m/s to a final velocity of 1.69 x 106 m/s whereas travelling a distance of 0.0827 m. The electron's acceleration is because of two electric forces parallel to the x axis: = 8.98 x 10-17 N and that points in the -x direction. Find the magnitudes of (a) net force acting on electron and (b) electric force.
It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 12m/s. What is the passenger's weight before the elevator starts moving
A 100-? resistor, an inductor and a 3.0-µF capacitor are connected in series with a time varying emf of 10.0 V and frequency 1000 Hz. What is the inductance of the inductor
A block of weight wt1 = 409 N sits on a frictionless table of mass 118 kg. The block is connected via frictionless pulley to a hanging block with weight wt2 = 172 N. FIND the tension in the rope connecting the two masses
An airplane with a speed of 76.6 m/s is climbing upward at an angle of 49.5 ° with respect to the horizontal, Relative to the ground, determine the angle of the velocity vector of the package just before impact
q1. a cd has a playing time of 53.1 minutes. while the music starts the cd is rotating at an angular speed of 498
The output voltage of an AC generator is given by ?v = 107 V sin (45?t). Find average power delivered to the inductor
A nearsighted patient's far point is 0.723 m from her eyes. What is the distance between her eyes and the glasses
If the rope starts at an angle of 30.0° with the vertical, illustrate what is Bruce's speed at the bottom of the swing?
A 1.50mm -diameter glass bead is positively charged. The potential difference between a point 1.50mm from the bead, What is the charge on the bead
Consider the mass spectrometer shown schematically in the figure below. The electric field between the plates of the velocity selector is 5900 V/m, Calculate the radius r of the path for a singly charged ion
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.00×10^6 km, What is the total work done by the two tugboats on the supertanker
A double-slit experiment uses light of wavelength 633 nm with a slit separation of 0.1 mm and a screen placed 2.0 m away. What is the linear width of the central fringe
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