12,748 Answered Questions for the topic physics

Physics

03/08/23

For the circuit below, find the equivalent resistance of the circuit and the current in the 5.0 resistor if R = 1.4 .
a.) equivalent resistance=b.)I(5.0 )=
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Physics

03/08/23

Find the equivalent resistance of the circuit shown in the figure below where R = 6.1 .
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Physics

03/08/23

Four resistors are connected to a battery with a terminal voltage of 12.0 V, as shown below, with R1 = 45 , R2 = 80 , and R3 = 19 .
(a) Determine the equivalent resistance for the circuit.(b) Determine the current in the battery.(c) Determine the current in the 30.0  resistor(d) Determine the power dissipated by R1(e) Determine... more
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Physics

03/08/23

The diagram shows four identical 3 Ω resistors attached to a 10 volt source.
(a) What is the effective resistance of this combination?(b) What is the current through the battery?
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Physics

03/08/23

work power and forces
sarah is trying to stop a .40 kg soccer ball that is rolling towards her. The horizontal velocity of the ball is 8m/s when she begins to stop it.a) what average net force would she exert on the... more
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Physics

03/08/23

work power and forces
dan is landing from a jump. His mass is 65kg, and he lands from the jump with a downward velocity of 4 m/s at contact.a) what impulse is needed to bring him to a stop as he is landing?b) if the... more
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Physics

03/08/23

work power and forces
You push shoes against the turf to cause a normal contact force of 600N. A machine then pulls the turf surface until it slides under the shoe. The machine pulls with a force of 400N before the turf... more
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Physics

03/08/23

work and power and forces
1) Kelly is trying to deadlift a 68 kg barbell that is setting on the ground.a) on her first attempt, she pulls straight upward with a force of 600N but the barbell does not move. How large is the... more
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Physics

03/08/23

Tension in strings
Find the tension in each of the three cables supporting the traffic light if it weighs 300 N (hint: both T1Y and T2Y, the "y" components of T1 and T1, need to equal the weight of the traffic light;... more
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Physics

03/08/23

Non-uniform Circular motion
This object is rotating at non-uniform circular motion. Its centripetal acceleration is ac  = 20 m/s2 and its tangential acceleration is at  = 13 m/s2. What is the total acceleration?What is the... more
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Physics

03/08/23

Vectors in physics
A boat sails 3km east then 5km south east then a further distance in an unknown direction. If his final position is 8km directly east od the starting point determine the magnitude and direction of... more
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Physics

03/07/23

If Wile E. Coyote runs of a cliff at a speed of 43 mph and the cliff is 2,100 meters tall, how long will it take for Wile E. Coyote to reach the ground?
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Physics

03/07/23

Circular Motion (top/Bottom)
A 38-g ball at the end of a string is swung in a vertical circle with a radius of 30 cm. The tangential velocity is 200.0 cm/s. Find the tension in the string (hint: sometimes gravity helps keep... more
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Physics

03/07/23

Three small lamps, R1 = 4.2 , R2 = 2.8 , and R3 = 1.6 are connected to a 9.0 V battery, as shown below.
(a) What is the equivalent resistance of the circuit?(b) What is the current in the battery?(c) What is the current in each bulb?(d) What is the potential difference across each bulb?
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Physics

03/07/23

An object, which is initially at rest on a frictionless horizontal surface, is acted upon by four constant forces. 𝐹1 is 25.1 N Acting due east, 𝐹2 37.0 N acting due north, 𝐹3 52.1 N acting due...
An object, which is initially at rest on a frictionless horizontal surface, is acted upon by four constant forces. 𝐹1 is 25.1 N Acting due east, 𝐹2 37.0 N acting due north, 𝐹3 52.1 N acting due... more
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Physics

03/07/23

Physics Volleyball Problem
A volleyball is slammed from a height of 2.8 m above the ground, at an angle of 76 degrees as measured counterclockwise from the -y axis, toward an opponent. It misses the opponent and strikes the... more
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Physics

03/07/23

Physics Question

Flying Circus of Physics Brake or turn? The figure depicts an overhead view of a car's path as the car travels toward a wall. Assume that the driver begins to brake the car when the distance to the... more
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Physics

03/06/23

Circular Motion
Kerel is swinging a bucket of water above his head to show off in front of a girl he likes. If the distance from Kerel's shoulder to the end of the bucket is 67 cm, what is the minimum speed... more
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Physics

03/06/23

What is torque exactly and why is torque perpendicular to force and radius? ?
From what I understand about torque, it is basically the power of the force to cause a change in an object's rotational motion. It is easier to cause this change when the force is applied further... more
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Physics

03/06/23

I don't understand this explanation. I don't get how the new acceleration is 8, if we didnt know what the mass or net force was. Where did the 2 for force and 1 for mass come from?
A cart is rolling down a hill at the rate of 2 m/s2. If the mass of the cart is cut in half and the net force is doubled, what is the new acceleration?I cant attach an image but this is what the... more
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03/06/23

Torque and Friction
An 85 kg man is two-thirds the way up a an 8 m ladder that rests against a smooth wall (smooth means no friction) and has a mass of 25 kg and makes an angle with the ground of 50°. Find the force... more
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Physics

03/06/23

find the size of the contact force between the two blocks.
Two blocks are in contact on a frictionless table. A horizontal force F is applied to M2, as shown. If M1 = 1.45 kg, M2 = 3.38 kg, and F = 5.40 N, find the size of the contact force between the two... more
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Physics

03/06/23

Tarzan (m =40 kg) tries to cross a river by swinging from a vine. The vine is 10 m long, and he know that the vine has a breaking strength of 1140 N. What is the maximum speed?
Tarzan (m =40 kg) tries to cross a river by swinging from a vine. The vine is 10 m long, and he knows that the vine has a breaking strength of 1140 N. What is the maximum speed that will be... more
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Physics

03/06/23

Vrms of offset AC voltage sources
As you know, if you put two DC voltage sources in series, you can provide a larger voltage to an apillication. For example, two 1.5V A batteries in series provide 3V You can do the same thing with... more
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03/05/23

How do I arrive at the wave function of a particle in a ring? Why would the answer be ψ = Ae^+-inθ and not one with sine or cosine?
How do I get to the particle wave function? . Consider a particle in a ring. For this example let the circumference line to extend from -L/2 to L2 with the end points glued together to form a... more
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