02/28/21

Dynamics Problems

A 25.0 kg crate is placed on a ramp set at an angle of 32°. The coefficient of static friction between the crate and the ramp is 0.55. Will the crate slide down the ramp? What is the force that is... more
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02/26/21

Spring Forces Question
 A light spring with a force constant of 32 N/m is connected to a wall and to a 1.8-kg toy bulldozer. When the electric motor in the bulldozer is turned on, it stretches the spring for a distance... more
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02/26/21

A loud speaker has an input of 73 dB. If the volume of the sound is turned up so that the output intensity is 10000 times greater, what is the new sound intensity level? dB
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02/24/21

A woman is opening a jelly jar. She exerts a 38.7 N force at a 75.0 deg angle on the lid, 0.0425 m from the lid's axis. How much torque does she exert?
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02/24/21

Rates of Power before and after
the component of the weight parallel to the surface of an inclined plane is mgsin() where  is the angle of the incline with respect to the horizontal direction. A 2.0-kg box slides downward... more
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02/23/21

Physics Homework Question
A box of mass m2 = 3.8 kg rests on a frictionless horizontal shelf and is attached by strings to boxes of masses m1 = 1.2 kg and m3 = 2.8 kg as shown below. Both pulleys are frictionless and... more
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02/22/21

What is the measure of each exterior angle for a regular triangle? Can someone please help me with this question? This question really stumped me.
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02/20/21

Potential (voltage) and the electric field
Explain the relation between potential (voltage) and the length of the electric field arrows? (In the case of two charge points, dipole)
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02/18/21

The equation of a line is -6x-2y=-18
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02/18/21

Two forces are applied to a block which
undergoes a displacement of 8.50m to the right along a frictionless surface while the force acts. The applied force, B = 350.0N and pulls the block to the right. Work equal to 780.0J is done by... more
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02/18/21

physics answers
Consider a rubber ball whose bounce has an efficiency of 80%. That means 80% of the kinetic energy before the bounce remains kinetic energy after the bounce. (The rest of the energy is converted to... more
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02/17/21

What are the six trigonometric functions?
Hello, I need help understanding what are the six trigonometric functions? I need help figuring out the correct formula or equation of the function. For example, I am not sure if Sine is opposite... more
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02/17/21

A 20m/s dog is chasing a squirrel with a velocity of 3m/s. What is the mechanical energy?

Please show work, of how you found the mechanical energy.
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02/17/21

Linear algebra (Matrices)

The equation for a parabola has the form y=ax2 +bx+c where a ,b and, c are constants and a≠0 Find an equation for the parabola that passes through the points (3,9), (1,5) and (4,17)
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02/17/21

To estimate the height of a building
To estimate the height of a building, two students find the angle of elevation from a point (at ground level) down the street from the building to the top of the building is 33∘. From a point that... more
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02/16/21

Two forces are applied to a block
which undergoes a displacement of 8.50m to the right along a frictionless surface while the force acts. The applied force, B = 350.0N and pulls the block to the right. Work equal to 780.0J is done... more
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02/15/21

Physics Bullet question with sum of work
A bullet A of mass m has an initial velocity v0 (vee nought). It strikes a block B (initially at rest on a smooth surface) and completely penetrates the block, emerging from the block with a... more
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02/15/21

Calculate spring force

How do I get the spring force from the initial length and distance stretched
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02/15/21

If you slowly lower a 20 kg bad of sand 1.20m from the trunk of the car to the driveway, how much work do you do? Round to the nearest 10th place.
Please write the formula and what the symbols stand for
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02/14/21

Inverse function
a. Find the inverse function of g(x)= (4x^5-2)/7b. Find g(g^-1 (x)) What does this tell you?(The ^-1 means 'inverse' idk how to put it on here lol, sorry)
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02/14/21

Solving word problems

The sum of the real numbers x and y is 24. Their difference is 12. What is the value of xy ? A. 108 B. C. 58 18 06 D. E. 9.
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02/13/21

Suppose that a semicircular region with a vertical diameter of length 18 is rotated about that diameter.

Determine the EXACT surface area (in square units) and the EXACT volume (in cubic units) of the resulting solid of revolution. Find: A. surface area in units2B. volume in units3
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02/12/21

A 34-kg crate rests on a horizontal floor, and a 73-kg person is standing on the crate.
(a) Determine the magnitude of the normal force that the floor exerts on the crate.(b) Determine the magnitude of the normal force that the crate exerts on the person.What is the logic behind this... more
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02/12/21

How do you find Work using only force?
Currently, in high school Physics, been working on this one for about an hour now:"A football player pushes a tackling dummy (mass = 70 kg) for 72 seconds. If he pushes with aforce of 82 N, what is... more
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02/11/21

I need help solving for the x and y coordinates. I got -5.97 for x and somehow my y coordinate is incorrect.
While placing a compact disc into a CD player, you notice a small chip on its edge. You attempt to play the CD anyway by placing the CD into the player's deck with the chip at 13.9 degrees as... more
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