371 Answered Questions for the topic physics B

Physics B Physics

01/27/21

Which of the following is correct
From work kinetic energy theorem ∑ W= ∧K and conservation of mechanical energy ∧U+∧K=0Which of the following is correct?A) ∧U= KB) ∧U=WC) ∧U= -KD) ∧U= -W(∧-DELTA)
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Physics B Physics Physics C

01/27/21

Venus has a mass of about 0.0558 times the mass of Earth and a diameter of about 0.381 times the diameter of Earth. The acceleration of a body falling near the surface of Venus is about:

Venus has a mass of about 0.0558 times the mass of Earth and a diameter of about 0.381 times the diameter of Earth. The acceleration of a body falling near the surface of Venus is about: (a) 0.21... more
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Physics B Physics Physics C

01/27/21

The speed of the object just before it hits the earth, in terms of G, M, and R is __________

An object is dropped from an altitude of one earth radius above the earth’s surface. Neglect air resistance. Let M = the mass of the earth and R = the radius of the earth. The speed of the object... more
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Physics B Physics Physics C

01/25/21

Given that the gravitational potential energy near the surface of the earth is given by U_g=mgh, find the gravitational force.
Given that the gravitational potential energy near the surface of the earth is given by U_g=mgh, find the gravitational force.I solved this question by taking the formula for gravitational... more
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Physics B

01/24/21

need help with this
If the drop from the table height is 0.402 seconds, then how high was the table?
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Physics B

01/23/21

Need help on this
If the job from the table height is 0.402 seconds how high was the table
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01/20/21

How do I approach this work in multiple dimensions question?
The path of a particle is described by the position vector vec r =<3t, t^ 2 ,-t> . The particle experiences a force which varies as a function of the particle's position, described by the... more
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01/18/21

A object of mass m falls from a height h. Find its speed immediately prior to impact using conservation of mechanical energy. Neglect air resistance and assume constant gravitational field.
A object of mass m falls from a height h. Find its speed immediately prior to impact using conservation of mechanical energy. Neglect air resistance and assume constant gravitational field.
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Physics B Physics Physics C

01/18/21

Physics Cliffs Question
You slide down an avalanche from a height of 20 meters. Once you reach the bottom of the avalanche, you have the misfortune of flying of a 15 meter cliff horizontally. How far from the base do you... more
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Physics B Physics Physics C

01/18/21

A jet fighter with a mass of 20,000 kg coasts through the sky at an altitude of 10 km and a velocity of 250 m/s. The jet then dives to an altitude of 2 km. Find the new velocity of the jet.
A jet fighter with a mass of 20,000 kg coasts through the sky at an altitude of 10 km and a velocity of 250 m/s. The jet then dives to an altitude of 2 km. Find the new velocity of the jet. All... more
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Physics B Physics Physics C

01/18/21

Stumped for hours on this rotational and spring motion question.
A 2-kg disc moves in uniform circular motion on a frictionless horizontal table, attached to the point of rotation by a 10-cm spring with a spring constant of 50N/m. When stationary, the spring has... more
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01/11/21

AP Physics Question about gravitational field
Two planets P1 and P2 orbit around a star S in circular orbits with speeds v1 = 45.8 km/s, and v2 = 56.8 km/s respectively.(a) If the period of the first planet P1 is 740 years what is the mass, in... more
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01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
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01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
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01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
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01/08/21

Which of the following has the greatest effect on the gravitational force between two objects?
A. Gravitational constantB. Distance between objects
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Physics B Physics Physics C

12/15/20

Find the two forces F1, and F2.
A diver of weight 1500 newtons stand at the end of a 4.0 meter diving board. Assume that the weight of the diving board is negligible. The board is attached to two pedestal that are 1.5 meters... more
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Physics B Physics Physics C

12/15/20

Find the two forces F1, and F2.
A diver of weight 1500 newtons stand at the end of a 4.0 meter diving board as shown assume that the weight of the diving board is negligible. The board is attached to two pedestal that are 1.5... more
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Physics B Physics Physics C

12/11/20

Which item gets to the bottom first?
A Hoop (a car tire), and a solid sphere (a bowling ball) and a solid cylinder (a round fence post) all roll down a hill at once. Which item gets to the bottom first?m g h = ½ m v2 + ½ I w2   w = vT... more
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Physics B Physics Physics C

12/10/20

Which item gets to the bottom first?
A Hoop (a car tire), and a solid sphere (a bowling ball) and a solid cylinder (a round fence post) all roll down a hill at once.  Which item gets to the bottom first?m g h = ½ m v2 + ½ I... more
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12/05/20

I need help with these two questions if someone can help me please? Thank you!
A top has a peg along its axis with a lightweight string wrapped around it. As shown below, the end of the string is pulled with a constant tension force F = 4.32 N, causing the string to unwind... more
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12/04/20

Can someone help me solve this?
Plaskett's binary system consists of two stars that revolve in a circular orbit about a center of mass midway between them. This statement implies that the masses of the two stars are equal (see... more
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12/03/20

Clamping Force and Clutch Calculation
A multiple clutch has to transmit 90kW from an engine running at 3500 rpm.Clutch lining outer diameter is 200mm and inside diameter is 160mm. Spring pressure on clutch is 170kPa and it's... more
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12/02/20

meter stick urgent help
A uniform meter stick of mass 1.5kg is attached to the wall by a frictionless hinge at one end. On the opposite end it is supported by a vertical massless string such that the stick makes an angle... more
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12/02/20

Pencil urgent help
A pencil leans against a wall so that its sharpened edge rests against the vertical surface of the wall and its eraser rests on the floor. The center of mass of the pencil is 9 cm from the end of... more
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