# Questions tagged [newtonian-mechanics]

Newtonian mechanics covers the discussion of the movement of classical bodies under the influence of forces by making use of Newton’s three laws. For more general concepts, use [classical-mechanics]. For Newton’s description of gravity, use [newtonian-gravity].

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### Ball on a string

A ball is attached to a string on a pole (i.e. Totem Tennis). If you hit the ball harder tangentially and horizontally, what will happen to the centripetal force, velocity and radius? Intuitively it ...
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### Rotational Equilibrium of a Rotating Titled Rod about a Vertical Axis

Consider: Here a rod AB is rotating about a vertical axis with a constant angular velocity and is supposed to not fall down but maintain its angle with the vertical axis. Here the point of suspension ...
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### Question Regarding the conservation of momentum in an inelastic collision of two rods

I am tasked with solving this question but am facing some intuition difficulty. consider this system: The empty circle signifies a nail that is stuck in the wall. I am unsure if there is conversion ...
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### Cannon sliding an inclined plane

A classical question but seems I get is wrong. A cannon is sliding an inclined plane. As some point (where we cannon speed is $v_0$ downwards) it shoots a missile horizontally with speed $v$. What ...
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### Net Force vs Net Work

I hope you are doing well :) When I was practicing, I came upon this question: On a horizontal frictionless surface there is a Spring with a Spring constant is 50 N/m. Initially, the spring is at its ...
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### The effect of windspeed on a car

I've worked problems in the past in trig class concerning the effect of wind on the speed of a plane and it's flight path and was wondering if a similar thing occurs with a car. First off, I'm ...
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### The formula of friction

So I had a question regarding the formula of frictional force (which is $F=\mu N$ where $\mu$ is the coefficient of friction and $N$ is the normal force b/w the objects and $F$ is the frictional force)...
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### Problem regarding components of forces in conical pendulum

For the motion of conical pendulum we can write equations as $$T_{F}\cos\theta =mg$$ $$T_{F}\sin\theta=\frac{mv^2}{R}$$ $T_{F}$ represents tension in the string. $v$ is the velocity of bob at this ...
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### What comes first: Work or kinetic energy?

Suppose we have a body initially at rest. Now a force ($F$) is continuously applied on it and it gets displaced by some distance $x$. My tutor said that from work energy theorem it gains kinetic ...
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### Properties of inertial reference frames from different perspectives

I was thinking about the following, a block on an inclined plane no friction. However this inclined plane is in a truck accelerating forward. Note: the inclined plane doesn't slip. So I wondered what ...
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### Solving of work done due to a non-conservative force

Q: A particle of mass m moves in the $x$-$y$ plane along the curve $y = x^2$. At $t = 0$, the particle is at $(1,1)$. The direction of motion at that point is as shown in the graph. The particle is ...
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### Problem in understanding inertial and non-inertial frame of reference

Consider a person standing still on the ground and a car, which is moving with a constant speed $v$ in a straight line. From the frame of reference of the car the person is moving backwards with same ...
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### Partial derivative in Newtons Second law

Newton's second law states Force is the time derivative of momentum. But is it a total derivative or partial derivative? What is the reason behind it?
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### Feeling heavy in an upward accelerating elevator - is it a pseudo force?

In an elevator accelerating upwards, a person weighs "heavier" on a scale. The normal force can be expressed as $N=m(a+g)$, a being the upward acceleration. In this case, is $ma$ a fictional ...
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### Tangential friction acting on a bug as it moves from center to periphery of a rotating disk

The question is if a bug is moving from center to periphery of a rotating disk or lets say vice versa; there is a tangential friction acting on the bug which is producing some torque. The small doubt ...
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### Doppler effect with circular motion [closed]

I've been struggling with this question that turned up in a physics exam last year and just can seem to get anywhere close to the answer. From the attached picture: An object is moving in a circle ...
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### Escape Velocity from Earth and Sphere of influence

I know that escape Velocity from the earth's surface is 11.2 km/s. But is that the minimum velocity to get to orbit (L.E.O I guess) or to escape earth's sphere of influence?
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### How to find angle using $τ = Iα$? [closed]

I want to find angle (radians) using the formula: $τ = Iα$ . I guess after finding angular acceleration α I have to do an integration but I am not sure which method I should use.
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### Pulley problem: I included the here the the picture of what i already tried doing [closed]

Pulley problem Problem: Find the tensions in the two cords and the acceleration of the blocks if friction is negligible. The pulleys are massless and frictionless, m1=200g, m2=500g and m3=400g. I am ...
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### Relative velocity, momentum conservation

I am having difficulty in conserving momentum for objects moving with relative velocities. For example: A block of mass $m$ with a semicircular track of radius $r$ rests on a frictionless ...