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Starting from rest, a truck travels in a straight line for 9.0 s with a uniform acceleration of +1.5 m/s2. The driver then applies the brakes for 2.0 s, causing a uniform acceleration of -3.0 m/s2 over that time.
(a) What is the truck's speed at the end of the braking period? m/s
(b) What is the total distance traveled by the truck (from the point where it started at rest to the end of the braking period)?
A loudspeaker of mass 21.0 {rm kg} is suspended the distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.90 {rm m}.
A cylinder of mass 11.0 kg rollswithout slipping on a horizontal surface. What is the rotational kinetic energy about its center of mass
A spring of unknown force constant is attached to a rod so that it hangs vertically. With no mass attached, the spring has a length of 12.0 cm. Determine the force constant for this spring
A closely wound rectangular coil of 85.0 turns has dimensions of 26.0cm by 46.0cm. estimate the average emf induced in the coil
a 70-kg bicyclist coasts down a hill that makes a 10degree angle with the horizontal at a speed of 10 ms.a if the drag
A basketball leaves a player's hands at a height of 2.20m above the floor. What is the range of initial speeds allowed to make the basket
Did primitive test to determine force of moving same object on two different ramps with similar slope. found a 20 lb increase in force in two feet. ramps are 9.5 length. what is difference in work for total length? and how does that effect human b..
A light source of wavelength λ illuminates a metal and ejects photoelectrons with a max KE of 1.00eV, Obtain what is the work function of the metal
A wood log with a volume of 12 ft3 is submerged in water. Calculate the buoyant force (in Newtons) acting on the log
Suppose that the electric field in the Earth's atmosphere is E = 1.38 102 N/C, pointing downward. Determine the electric charge in the Earth
A violin string 15.2 cm long and fixed at both ends oscillates in its n = 3 mode. The speed of waves on the string is 273 m/s, and the speed of sound in air is 348 m/s. What are (a) the frequency and (b) the wavelength of the emitted sound wave?
Calculate the ratio of the intensity of an earth quake wave as it passes a point 27 kilometer from the source to the intensity as it passes a point 15 kilometer from the source
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