12,795 Answered Questions for the topic physics

Physics

07/06/22

Physics question

A point moves with simple harmonic motion whose period is 4 s. If it starts from restat a distance 4.0 cm from the centre of its path, find the time that elapses before it hasdescribed 2 cm and... more
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Physics

07/05/22

What are the required assumptions/conditions that need to be met in order to apply Bernoulli's equation to a fluid?
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Physics

07/03/22

The car has a mass of 1200 kg
1) The same car reaches a top speed of 15 m/s, then begins braking. It comes to a halt in 20 seconds. Draw a free body diagram of the car and find the force of friction (magnitude and direction)... more
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Physics

07/01/22

Comparing different substances going through the same change in temperature range, how can we tell
Comparing different substances going through the same change in temperature range, how can we tellA. Which substance cools off/warms up faster?B. Which requires more heat?C. Which expands/contracts... more
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Physics

07/01/22

How to produce a larger pressure with the same amount of force
How to produce a larger pressure with the same amount of force
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07/01/22

When the size of an object were scaled up by a factor of 10 while retaining its present proportions, how would it affect the object's strength-to-weight ratio, and its surface area-to-volume ratio?
When the size of an object were scaled up by a factor of 10 while retaining its present proportions, how would it affect the object's strength-to-weight ratio, and its surface area-to-volume ratio?
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Physics Calculus

07/01/22

What is the velocity and position of this problem?
A particle moves along the x axis with its position relative to the origin and has an acceleration function a(t) = 4(t) + 6, in cm/s^2 and time t in seconds. If the initial velocity of the particle... more
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Physics Science

06/30/22

A solid sphere of mass m is attached to a light spring of force constant k so that it can roll without slipping along a horizontal surface. Calculate the period of oscillation made by sphere.
A solid sphere of mass m is attached to a light spring of force constant k so that it can roll without slipping along a horizontal surface. Calculate the period of oscillation made by sphere.
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Physics Science

06/30/22

Physics problem about two people sitting on a boat
A boat of lenght L and mass M is on still water. On the both ends of the boat two people are sitting with masses m1 and m2. How and what distance the boat will move after two people change their... more
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Physics Science

06/30/22

Sledge moving on a surface with friction
A sledge moving on a frictionless icy surface with v0=5 m/s, suddenly moves out onto the road. What is the distance the sledge will have moved on the road if the lenght of the slide is l=1 m, and... more
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Physics Science

06/30/22

Interesting physics problem about a bullet piercing through an object
A cube made of foam with mass of 100g is placed on a weak horizontal surface. The height of the cube is 10 cm. Then, a person shoots a bullet underneath the cube. The initial velocity of the bullet... more
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Physics Science

06/30/22

Friction on an icy surface
A human with mass of 70 kg is standing on an icy surface, then he tosses a 3 kg rock horizontally with velocity of v=8m/s. Find the distance the human will move after throwing the rock if the... more
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Physics Science

06/30/22

Physics problem about evaporation
The force of gravity acts on a raindrop of mass m0 making it fall down and slowly evaporate. Due to this, the mass of the raindrop gets smaller every second by ∆m. Calculate the force done by... more
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Physics Science

06/30/22

Inclined plane and pulley together
An object of mass m=3 kg is put on an inclined plane and tied along stationary pulley to a spring with coefficient k=80 N/m. The angle of the inclinde plane is 30 degrees, there are no friction... more
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Physics Science

06/30/22

Tricky physics problem about impulses
A projectile shot upwards, at the highest point explodes into three fragments. The first two fragments flied away with an angle of 90 degrees. The mass of the first fragment is m1 = 9 kg, velocity... more
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Physics Science

06/30/22

Physics: calculate the impulse
A molecule with initial velocity of v = 600 m/s strikes into a container wall. The angle between molecule's initial direction and the wall is α = 25°. The collision is absolutely elastic. Calculate... more
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Physics Science

06/30/22

Find the minimum amout of work
A brick (right rectangular prism) with density p and dimensions a×a×2a is resting on its side (horizontally), what minimum amount of work needs to be done to lift it up and place vertically.How to... more
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06/30/22

The electric field intensity 2m from the surface of a charged sphere is 30.86 x103 N/C. The charge density at the surface of the sphere is 8.85 x 19‒7 coul/m2. What is the radius of the sphere ?
The electric field intensity 2m from the surface of a charged sphere is 30.86 x103 N/C. The charge densityat the surface of the sphere is 8.85 x 19‒7 coul/m2. What is the radius of the sphere ?•... more
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Physics

06/30/22

HOW TO SOLVE? Net Force (Physics)
Three identical point charges , each 10 mC , are placed at the vertices of an equilateral triangle such thattwo of these charges are located at the coordinate origin and at (10 cm, 0 cm) and the... more
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Physics

06/28/22

A car is waiting at a stoplight. The car has a mass of 1200 kg. What is the force (magnitude and direction) that the road puts on the wheels?

2) The same car accelerates out of the stoplight at 1.5 m/s2. find the force of friction (magnitude and direction) that the road puts on the wheels.
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Physics

06/27/22

Physics doubt -
In a concave mirror, when an object is placed between C and F, the image formed is real, inverted and magnified. But to find magnification, we need to divide the image height(-) with the object... more
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06/26/22

About gravity my biggest question
I have a big question. According to Newton's law of Gravitation, every single atom attracts every other atom in the universe. The scientists have hypothesised a partical, gluon, to be responsible... more
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Physics

06/25/22

a car drives at a constant speed of 23 m/s it is subject to a drag force of 500 N what power output is required from the car's engine to drive the car on level ground
a car drives at a constant speed of 23 m/s it is subject to a drag force of 500 N, what power output is required from the car's engine to drive the car on level ground?
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Physics

06/25/22

physics question - in order to lift a 50 kg height from the ground to over your head, a vertical distance of 2.2 m how much metabolic energy must

in order to lift a 50 kg height from the ground to over your head, a vertical distance of 2.2 m how much metabolic energy must be expended assume the usual efficiency for the human body of 25%.
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Physics

06/25/22

a fireman of mass 80 kg slides down a pole at constant speed. when he reaches the bottom, 4.2 m below his starting point, how much has thermal energy increased during his slide?
a fireman of mass 80 kg slides down a pole at constant speed. when he reaches the bottom, 4.2 m below his starting point, how much has thermal energy increased during his slide?A. 2800 JB. 3300 JC.... more
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