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An elevator moving upward approaches the top floor of a high rise building and begins to slow down at the rate of 2.00 m/s2.
(a) Will a passenger in the elevator feel a lighter or heavier weight during this time?
(b) Draw a free-body diagram to show all the forces on the passenger.
(c) Calculate the apparent weight of the passenger if her mass is 60.0 kg.
If an automobile rounds this curve at 30 {rm m/s}, illustrate what is the minimum coefficient of static friction between tires and road needed to prevent skidding?
what is the cost of the electric energy equivalent to the energy in a Big Mac? (the cost of a Big Mac is $3.57)
Scientists have found evidence that Mars may once have had an ocean 1.00km deep. What would be the gauge pressure at the bottom of such an ocean
A 0.291-kg volleyball approaches a player horizontally with a speed of 12.2 m/s. What impulse is delivered to the ball by the player
A jogger is running around a circular track of circumference 470 m. If the jogger has a speed of 8 km/h, what is the magnitude of the centripetal acceleration of the jogger
A heat engine operates in a Carnot cycle between72.0°C and345°C. It absorbs21,600J of energy per cycle from the hot reservoir. How much energy does it expel in each cycle by heat
The lens and mirror are separated by d = 1.00 m and have focal lengths of +80 cm and -50 cm, respectively. An object is placed p = 1.00 m to the left of the lens as shown.
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 40-kg child sits on the other end. How long is the beam
A 2.20-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 4.50sin(2*pi*t), Find the resonance angular frequency of the system
What is the rate of change entropy of the first reservoir.
In an X-ray scattering measurement the first order diffraction peak is observed at ? = 16.5°. What is the angle of the third order peak
Two cars of mass 2000 kg and 1000 kg, respectively, collide inelastically. Their velocity after impact is 4 m/s, Find the initial speed and direction of the lighter car
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