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A 3.00-kg object has an initial velocity (6.00i - 2.00 j) m/s.
(a) What is its kinetic energy at this time?
(b) Find the total work done on the object as its velocity changes to (8.00i +4.00j) m/s. (Note: From the definition of the scalar product)
You are on a swing with a chain 5.19 m long. If your maximum displacement from the vertical is 18.1°, how fast will you be moving at the bottom of the arc
consider two ZAMS stars: 09 and B0. The effective temperature of the 09 star is 34,500 k. Assuming a hydrogen density of 10^8 m^-3, and Alpha = 3.1 x 10^-19 m^3 s^-1, estimate the Stromgren radius of the stars in pc and AU
An aluminum rod is 17.0 cm long at20°C and has a mass of 350 g. If 14000 J of energy is added to the rod by heat, what is the change in length of the rod
A car starts from rest and travels for 7.0 s by a uniform acceleration of +2.7 m/s2.The driver then applies the brakes, causing a uniform acceleration of -3.0m/s2. If the brakes are applied for 1.0 s, decide each of the following. How fast is the car..
A 1.0-kg block is pushed up a rough 22o inclined plane with a force of 7.0 N acting parallel to the incline. The acceleration of the block is 1.4 m/s2 up the incline. Decide the magnitude of the force of friction acting on the block.
The cable lifting an elevator is wrapped around a 1.0--diameter cylinder that is turned by the elevator's motor. The elevator is moving upward at a speed of 2.3 . It then slows to a stop, while the cylinder turns one complete revolution.
An extra solar planet's orbit has a semi major axis of 21.1 AU. The eccentricity of the orbit is 0.010. Find what is the periapsis distance
A predatory fish accelerates from rest to 4.04m/s in 0.14s. How far, in meters, did the fish travel in this time
A thin horizontal 10cm x 10cm copper plate which is 1 mm thick has 1010 excess electrons. If the electrons are uniformly distributed, what are the strength and direction of the electric field a) 0.1 mm above the top surface of the plate? b) in the ce..
The charge and the mass of an alpha particle are = 3.20×10-19 and = 6.68×10-27 , respectively. What is the final velocity of the alpha particle
A 5N force is applied to a wheel with a rotational inertia of 0.080 kg m2 that has a radius of 5 cm, What angular aceleration did it cause
a lead bullet with a mass of 0.02 kg traveling at 198 ms strikes an armor plate and comes to a stop. if all the energy
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