Q&A for How to Solve Any Physics Problem

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  • Question
    How can I pass physics in grade 10?
    Community Answer
    Keep trying and be thorough in learning the theories. Don't hesitate to ask any questions of your teacher if you don't understand something. Write notes and list down the formulas and stick them on your wall. Keep reviewing and things will fall into place easily.
  • Question
    I struggle to remember physics formulas. Any tips?
    Community Answer
    Write the formulas down over and over again while standing up. Studies show that doing so can improve your recall. Also, you could record yourself reading the formulas and play them on a loop while you sleep.
  • Question
    What is the relationship between Kelvin and Celsius?
    Community Answer
    0 degree Celsius = 273 Kelvin. Therefore, 25 degree Celsius (25 + 273) = 298 Kelvin.
  • Question
    What is angular velocity?
    Community Answer
    It's the velocity of the object moving in a circular path. As it continuously changes its direction while moving in a circular path, it changes its angles - hence, angular velocity.
  • Question
    A body is at rest, and gains a velocity of 10 ms-1 in 5 seconds. How do I find the acceleration and the distance covered by the body?
    Community Answer
    Find the acceleration by using v = u + at, with 0 m/s as the initial velocity (u) and 10 m/s as the final velocity (v), and 5 s as time. Substitute the known values to get the distance covered by the body (x) in the equation v² = u² + 2ax, or in the equation x = ut + 1/2 at².
  • Question
    What is a ruby made of?
    Community Answer
    A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). The red color is caused mainly by the presence of the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires.
  • Question
    What does analog in physics mean?
    Community Answer
    Analog in physics means that any parameters or values are represented in a mechanical way. Take for example the analog clock, whose hands move mechanically and continuously around the face.
  • Question
    A ball hits a wall horizontally at 6m/s, it rebounds horizontally at 4.4 m/s, the ball is in contact with the wall for 0.04s, what is the acceleration?
    Community Answer
    u = 6m/s v= 4.4m/s t = 0.04sec. Using v= u+at i.e a = v - u / t now substitut values , a= 4.4-6/0.04 = -40m
  • Question
    Help me solve this problem? "An electric circuit is shown in the figure. I is the current entering into the circuit at A. What is the potential difference between C & D and what is the resultant resistance between A & B?"
    Community Answer
    Potential difference can be found out by subtracting the value of given D from C.
  • Question
    Why does gravity vary from place to place?
    Community Answer
    Because the gravitational field strength (acceleration due to gravity) is higher at sea level than on top of a mountain.
  • Question
    A force of 16 N acts on an area of 0.16 m2. What is the magnitude of pressure in pascals?
    Community Answer
    Pressure=Force/Area. Here Force is 16 N and Area is 0.16 m2. Hence Pressure will be 16/0.16=100 pascals.
  • Question
    How do I find the mass of an object?
    Community Answer
    wikiHow has a specific article on how to Calculate Mass .
  • Question
    What is the heat capacity of 80.0 kg of silver?
    Community Answer
    Heat capacity is an intrinsic property of the material. So, it is the same value regardless of the mass, shape, or texture of the said material. For silver it is 0.233 J/g m K.
  • Question
    What is displacement in physics?
    Community Answer
    The shortest distance between the final and the initial position is called displacement. It is a vector quantity, as it has both direction and magnitude.
  • Question
    A vehicle accelerates from rest to 12 m/s in 5 seconds. How far does the vehicle travel?
    Amei Jutt
    Community Answer
    V=12, T=5, V=D/T, 12=D/5, =>D=12*5, =>D=60 meters. With this, D represent the distance traveled by the vehicle at the rate of 12 meter/sec for 5 seconds traveling a total of 60 meters.
  • Question
    How can I understand moment of force?
    Community Answer
    Force = mass × acceleration. So, the moment of force is the product of mass into the acceleration of 1ms^_2.
  • Question
    How do I find the speed of a throw?
    Community Answer
    By determining the angle of throw, distance, time before landing, and using the formula.
  • Question
    Why can't I solve problems during an exam?
    Community Answer
    You can't solve problems during an exam because you are panicking. You need to take a deep breath, calm down, and relax so that your brain can function well.
  • Question
    What is the difference between displacement, velocity, acceleration, and speed?
    Community Answer
    Displacement is the smallest distance between two points. Velocity is the displacement per unit of time. Acceleration is the velocity per unit of time. Speed is the distance covered per unit of time.
  • Question
    What is weight of a body of mass 20kg at the equator?
    Community Answer
    The weight of the body will be given by W=mg Where W=weight m=mass g=gravity hence W=20kg*10N which will be equal to 200N. That will be the weight of the body at equator since gravity won't change on Earth unless you travel outside earth.
  • Question
    How do I label velocities?
    Community Answer
    Label them as V and write the number or an alphabet beside it based on the velocity. for example, initial velocity is given as 20 m/s and final velocity is given as 40 m/s. write like Vi=20 m/s and Vf = 40 m/s or V1= 20 m/s or V2 = 40 m/s. We do this for our understanding, but you can write in any way you want. The above one is the most common method.
  • Question
    How do I approach problems on frictional force?
    Ayush Abhilash
    Community Answer
    Since frictional force is negative, you have to take it as negative even if the value is not given and the force applied by the object must be taken as positive. use F= ma and equations of motion to find out the variables.
  • Question
    A silk rubbed on a hair several times acquires a net charge of - 0. 25 C. Did the silk gain or lose electron? How many electrons were transferred?
    Ayush Abhilash
    Community Answer
    The silk rod gained electrons. Use the formula Q= ne . where e is the charge on one electron that is -1.6*10^-19 and Q is given as -0.25 C. substituting these values we get n= 15.7*10^17( approx) that is the number of electrons. Always remember if there is negative charge it gained electrons and if there is positive charge it lost electrons.
  • Question
    What is an easy way to avoid calculation mistakes in Physics numericals?
    Donagan
    Top Answerer
    Use a calculator and double- or triple-check your work.
  • Question
    What do I do if I feel overwhelmed about physics problems?
    Donagan
    Top Answerer
    Ask for help from a teacher, a tutor or a friend.
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