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Paula is probably an object with 21 N force friction is pushing back against the object object with a force of 14 N Draw Freebody diagram and determine what the net forces and in what direction is acting
An airplane wing with an average cross sectional area of 10 m2 experiences a lift force of 5000 N. What is the difference in air pressure, on the average, between the bottom and top of the wing?
Which of the following statements about gravity are true? 1. There is no gravity on the moon. II. For all objects on Earth, the force of gravity is approximately 9.8 N III. In a vacuum, all objects fall at the same rate. IV. Acceleration due to gravity can be found by dividing the force of gravity by the mass of the object. a) III and IV only Ob) II, III, and IV only Oc) II and IV only d) I, II, and Ill only e)
A wire of length 4.0 m with a cross-sectional
area of 3.2x10–6 m2 has a resistance of 0.065 Ω.
Determine the resistivity of the wire.
1. What happens if the filament of a single bulb fails (or if the bulb is
removed from its socket)? Why?
Two simple pendulums have the same string-length, but their bobs have different masses m1 = 25 g and m2 = 100 g. The ratio of their periods "T1 / T2" is equal to:
One end of a copper poker is placed in a fire with temperature of 600°C, while the other end is kept at room temperature (25°). The poker is 1,5 m long and has a radius of 3 x 10-3 m.
The bob of a simple pendulum is pulled to the right by an angle θ_0 = 10° and then released from rest. If the period of oscillation equals to one second, what is the time needed for the bob to reach the angular position θ = -5° for the first time? (g = 10 m/s^2)
A sinusoidal wave travelling in the positive x-direction has a wavelength of 0.4 m, an amplitude of 20 cm, and a period of 4 seconds. The transverse position of an element of the medium at x = 0 and t = 0 is y = 10 cm, and the element is moving downward. The expression of the wave function describing this wave is:
How much heat is required to change 10g of ice at exactly 0°C to steam at 100°C ?
