10,365 Answered Questions for the topic physics

Physics

1d

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
Physics

3d

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
Physics

3d

How to produce a larger pressure with the same amount of force

How to produce a larger pressure with the same amount of force

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?
Physics Calculus

4d

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
Physics Science

4d

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.
Physics Science

4d

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
Physics Science

4d

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
Physics Science

4d

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
Physics Science

4d

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
Physics Science

4d

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
Physics Science

4d

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
Physics Science

4d

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
Physics Science

4d

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

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
Physics

6d

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.
Physics

7d

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

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
Physics

9d

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?
Physics

9d

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%.
Physics

9d

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
Physics

9d

physics question

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
Physics Science Chemistry

10d

What is the basic difference between a cloud and fog?

What is the basic difference between a cloud and fog? A. Fog is a cloud near the ground. B. Clouds form when air is cooled, whereas fog forms when air is heated. C. Clouds form when air is heated,... more
Physics

10d

Force from multiple charges

Calculate the net force on particle q1.First, find the direction of the force particle q2 isxerting on particle q₁. Is it pushing to the right (+)or to the left (-)?can someone plz answer this?
Physics Math Calculus

11d

Glass has an index refraction of 1.52. A ray of light is shone from air into glass so that the angle of incidence is 18.0 degrees. Calculate the angle of refraction.

Glass has an index refraction of 1.52. A ray of light is shone from air into glass so that the angle of incidence is 18.0 degrees. Calculate the angle of refraction.Please include a detailed and... more

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