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A bicycle and rider have a combined mass of 70.0 kg and are moving at 6.00 m/s. A 70.0 kg person is now given a ride on the bicycle (total mass 140.0 kg). How did the addition of the new rider change the kinetic energy at the same speed?
An object with mass 4.0 is attached to a spring with spring stiffness constant 230 and is executing simple harmonic motion. When the object is 1.9×10?2 from its equilibrium position, it is moving with a speed of 0.65 . Calculate the amplitude of the ..
A subatomic particle has an unknown lifetime τ. The particle is created at t = 0 and travels around the Earth’s equator at speed 0.982 c. If the particle decays at the moment it completes one single trip around the Earth, what is τ?
A small block has a horizontal velocity of 4.00 m/s as it slides off the edge of a table. The table is a vertical distance of 1.00 m above the floor. how far does the block travel horizontally while it is in the air
To cross a river that is 1 km wide, with a current of 6km/h, a novice boat skipper holds the bow of the boat perpendicular to the far river bank, At what point will the boat actually contact the far bank
an airplane has a mass of 27500 kg and takes off under the influence of a constant net force of 41000 n. what is the
Prove that the efficiency of two Carnot engines operating in tandem, one going from a cold reservoir of temperature Tc to a hot reservoir ofTj, then the second going from a cold reservoir of temperature Tj to a hot reservoir of temperature Thmust ..
A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 265 kg · m2, What is the new angular speed of the merry-go-round
Water at 20-C flows over a 3-m long and 2-m wide flat plate at 3 m=s. Assume a turbulent flow from the leading edge (a trip wire at the leading edge can be used to cause the turbulence) and calculate:- d at x ¼ 3 m.
an entertainer juggles balls while doing other activities. in one act she throws a ball vertically upward and while it
A heat rate of 3kW is conducted through a section of an insulatingmaterial of cross-sectional area 10m2 and thickness2.5cm. If the inner (hot) surface temperature is 415oCand the thermal conductivity of the material is 0.2 W/m.K, what is the outer su..
A uniformly accelerated car passes three equally spaced traffic signs. The signs are separated by a distance d = 21 m. obtain the magnitude of the acceleration of the car
In a time of T seconds, a motorcycle can accelerate from rest to the speed v. Determine the speed of the motorcycle (in terms of v) 2T after starting
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