A 50kg sack of rice is pushed down with uniform speed across a horizontal floor by a force directed 30° below the horizontal. The coefficient of friction is 0.25. find the magnitude of the force.

Q: A 506 N was applied to a 209 kg block, find the normal force if the angle 0 = 37.5 degrees. F

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Q: A balloon, in the shape of a right circular cylinder, is being inflated in such a way that the…

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Q: A 3.002 gram peanut is combusted in a bomb calorimeter containing 100 mL of water at 21.3 degrees…

A: Given: Mass of peanut, m = 3.002 g Initial Temperature, T1 = 21.3oC = 273 + 21.3 = 294.3 k Final…

Q: Q15: A rock is thrown downward from the top of a 40.0-m- tall tower with an initial speed of 12 m/s.…

A: Given(s): The initial speed of the rock, u=12 m/s. The rock was thrown from a height of, h=40.0 m.…

Q: A flywheel rotating at 483 rev/min is brought to rest with a uniform deceleration of 2.91 rad/s2.…

A: Initial angular speed , wo = 483 rev/ min. wo = 483(2π/60) rad/s  wo = 50.554 rad/s  Final angular…

Q: What is the magnitude and direction of the electric field 1cm above a 24uC charge?

A: charge q = 24uC  r = 1cm = 10-2 m  k = 9×109

Q: An electron is trapped in a one-dimensional infinite potential well that is 430 pm wide; the…

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Q: Consider small-amplitude oscillations of a rocking horse. Movement occurs only in the vertical…

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Q: Help with 11

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Q: What net force is needed to give a 40.0 kg grocery cart an acceleration of 2.4 m/s^2? a. 0.06 N c.…

A: Force is directly proportional to the product of mass with acceleration F=ma Where,  M is the mass a…

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A: A high student is unable to focus on objects closer than 0.5 m so the eye defect is far-sightedness…

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A: Option (3) is correct answer. Nearsightedness: the lenses are not converging enough and diverging…

Q: The figure shows an electric dipole. What is the magnitude of the dipole's electric field at point…

A: The situation of the electric field is shown below.

Q: The time constant for this circuit is 1 ΜΩ 45 V 3 µF O seconds 3 seconds 3 microseconds 0.33 seconds

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Q: 15.7 kg toy is thrown by an angry child at a speed of 1.96 m/s. At the same time, another angry…

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Q: A 250-Ω resistor is connected across an ac voltage source V = (150 V) sin [2π(60 Hz)t]. What is the…

A: Given:- Resistance of the resistor connected to the source is R=250Ω Ac voltage source V=(150…

Q: If an object is emitting sound and is moving through the air at the same time, which effect best…

A: Doppler effect or Doppler shift is a phenomenon that is observed whenever the source of waves is…

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Q: A bucket full of water hangs from one end of a string that passes over a light pulley. The other end…

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Q: An object moving along a horizontal coordinate line has directed distance s(t) = t - 6t2 + 9t + 11…

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Q: 3 4 6 V 6Ω 8 7 6 What is the voltage across the 4 W branch? Volts (Do not include units) What is the…

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Q: Q8: One gallon of paint (volume = 3.78 x 10° cm³) covers an area of 25.0 m². What is the thickness…

A: Volume is equal to the area times thickness. Therefore, Volume=Area×ThicknessV=A×t

Q: P-2. A steel shaft 2 m long that has a diameter of 90mm. is subjected to a torque of 10 KN-m. Use G…

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Q: What is the magnitude of the final velocity of a 7.5 kg moving push cart maintained by an unbalanced…

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Q: A marble rolls off the edge of a 1.2 meter high table with an initial speed of 0.5 m/s. a) how long…

A: Write the given values with the suitable variables. h=1.2 mu=0.5 m/s Here, h is the height and u is…

Q: What is the implication of light with 100 CRI?

A: Colour rendering index ( CRI) defines colour visibility on the scale of 0 to 100.

Q: A train is heading away from you, the sound waves, emanating from the train, that reach you will…

A: Correct option (b) Lower frequency , lower pitch. Reason -If the sound source is moving away from…

Q: 6) An object 2.0 em tall is in front of a converging lens of focal length 22 cm. The object is 10 em…

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Q: Q3: Kinetic energy, K has dimensions kg m² /s?. It can be written in terms of the momentum p and…

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Q: Two identical waves, each of wavelength A = 1 m, produce a standing wave on a %3D 2-m thin rope. If…

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Q: What is the equivalent resistance of a 3.0 resistor and a 6.0 resistor connected in parallel

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Q: Why a ball rolling across the floor does slows to a stop? a. The force that started it moving wears…

A: A ball rolling across the floor does slows to a stop because of a set of force acting on it, i.e.,…

Q: How does angle θ affect the value of coefficient of friction?

A: Relation between θ and coefficient of friction:

Q: Trials Mass 1 (kg) Mass 2 (kg) V1; (m/s) V2; (m/s) V, (m/s) 1 0.5 0.5 0.2 0.1 0.3 0.3 0.1 0.0 0.05 3…

A: 10 different trials are given for inelastic collision between two carts To find : total momentum of…

Q: Josh threw the marble vertically upward with a sped of 66ft/s from the bridge. On the way down, the…

A: Given Initial speed of the marble is v0=66 ft/s Time taken by the by the marble to fall into the…

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Q: An oblect of mass 400 of 20ms Find the forc

A: 1) Given:-  The mass of an object is m = 400 kg  the acceleration of an object a = 20 m/s2 Find:-…

Q: Starting from the same point, Reden starts walking eastward at 60 cm/s while Neil starts running…

A: Given:Reden start walking eastward at 60 cm/sNeil starts running toward south at 80 cm/sTo Find:How…

Q: 9. In the two circuits below, the batteries and all bulbs are identical. Compare the current flowing…

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Q: What is the amount of force needed to keep a cannon ball moving if you were in space ship and fired…

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Q: A bullet hits a wooden block on the underside and becomes embedded in it. The mass of the bullet is…

A: Let velocity of bullet + block system after collision is v  Now, by momentum conservation…

Q: 4. Calculate a. Current in each resistor b. Voltage in each resistor c. Power in each resistor R1 R2…

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Q: Q18: A pebble is released from rest at a certain height and falls freely, reaching an impact speed…

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Q: EVALUATE THE STATEMENT. The resistance of a wire is (I) proportional to its length and (II)…

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Q: Question 7 Two closely spaced parallel wires carry currents of 1.25 A and 1.98 A in opposite…

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Q: The diagram below illustrates the phenomenon of "missing orders" in the interference pattern made by…

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Q: An object with a mass of m = 5 kg is attached to the free end of a light string wrapped around a…

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Q: Q9: The Andam auditorium in Dungu Campus of UDS measures 40.0 m × 20.0 m × 12.0m. The density of air…

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Q: Kinematics An engineer is designing the runway for an airport. Of the planes that will use the…

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: