Newtons Laws of Motion

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied

To find the mass of gas ejected per second, first calculate the initial force needed for the rocket to accelerate at 25.0 m/s^2. Then, use this force and the relative velocity of the gas to find the mass flow rate using the equation Force = mass flow rate * velocity. This will give you the mass of gas ejected per second.

The acceleration of an object thrown vertically upwards can be calculated using the kinematic equation (v_f^2 = v_i^2 + 2a \cdot d), where (v_f) is the final velocity, (v_i) is the initial velocity, (a) is the acceleration, and (d) is the distance. Given that the object is thrown vertically upwards, the equation becomes (0 = (44 , \text{m/s})^2 + 2 \cdot a \cdot (-3.5 , \text{m})). Solving for (a), we find that the acceleration is approximately -104 m/s², which indicates that the object is accelerating downwards.

Nothing fuels a comet. They are just ice balls orbiting the Sun forever (until they run into something). By the way, the tails of comets do not stream out behind them. The tails of comets always point away from the Sun.

Newton's third law of motion states that for every action, there is an equal and opposite reaction. This law highlights the symmetry in forces between interacting objects.

A force exactly equal to your weight. If you weigh 100 lbs and you sit, lie or stand still, the ground pushes up on you with a force of 100 lbs. This is an example of Newton's First Law of Motion in a static setting. If the ground pushed on you with more than 100 lbs, then you would rise up, if it pushed you with less than 100 lbs, you would sink down. The fact that you stay still shows the forces acting on your body (gravity pulling down and the ground pushing up) are exactly equal and opposite.

oppose the motion of an object in contact with a surface. It is dependent on the nature of the surfaces in contact and the normal force pressing them together.

0 because while the mass remains at 16 Kg, as the object is falling its weight (caused by the pull of gravity on its mass) becomes 0 as its acceleration equals that of the acceleration due to gravity. (This is why things seem weightless when in orbit round the Earth - they are actually falling).

say its left of the fulcrum, then its (9*2)18 n-m anti clockwise torque, to balance this ,to the right of the fulcrum, force * distance needs to be 18, any combination will do, 2*9,3*6,6*3 etc , this is clockwise torque

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That depends on several things. Since the object is described as having weight I assume it is stationary on the earths surface but this is really not necessarily the case, if it's on the moon or Mars or even in free fall, despite the reference to weight, these would all alter the initial conditions and hence, the answer. Secondly, what direction is the force acting in. If the object is sitting on the ground or a sturdy table and the force acts downward then the final answer will be zero. If the object is being held up by some not so strong object which will break upon application of this force then the answer depends entirely on how high this apparatus was and could be zero or the result of the combination of gravity plus the 392 Newton force plus the friction with the air if you want to consider that. But what if the new force is not acting down, what if it is acting upward, or sideways or at some angle to be given. These all give very different answers. Sitting here though, I am realizing that there is one general equation or system of equations which would take all of this into account and give you your answer regardless of the different variables. I am too sleepy to work it out right now but it is a fun exercise and I will try to find time to derive it in the next day or so and post it.

1200w

100w

The energy changes in a Bunsen burner involve the conversion of chemical energy in the fuel (such as natural gas or propane) into heat energy through combustion. This heat energy is then transferred to the surroundings as thermal energy when the flame is used for applications like heating or sterilization.

False. The acceleration of an object is directly proportional to the net force acting on it.

Newton's 2nd Law:

F = ma

where F is the force, m is the mass, and a is the acceleration.

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The acceleration of a body is "inversely" proportional to its mass.

Your weight. Weight is the definition of the force between the earth and other objects. Thus you weight is the gravitational force acting on you from the earth.

The first thing to do is to determine what forces are acting on the skydiver.

The force of gravity is pulling the skydiver downward, and can be described using Newton's 2nd Law:

F = ma

where F is the force, m is the mass, and a is the acceleration.

In this case, the acceleration is in the negative downward direction, and it is equal to the acceleration due to gravity,g, or 9.8 m/s2. So:

Fg = m(-g)
Fg = (100 kg)(-9.8 m/s2)
Fg = -980 N

The air is resisting her fall, so there is a force pushing upwards. Let's call it Fa, and it is given as 500 N. So:

Fa = 500 N

Nothing else is touching the skydiver, so there are no other forces acting on her.

To determine the acceleration, use the net force equation:

Fnet = ma

where Fnet is all the forces acting on the object.

Fnet = ma
Fg + Fa = ma
-980 N + 500 N = (100 kg)a
-480 N = (100 kg)a
(-480 N) / (100kg) = a
-4.80 m/s2 = a

This question cannot be answered without knowing the acceleration of the box.

Certainly it does. My question is why wouldn't mass affect momentum? Let us consider a baseball versus a bowling ball, rolling towards each other on a level floor. Now knowing that mass affects momentum, you can predict that when the bowling ball and the baseball collide, that the baseballs trajectory will be changed far greater than the trajectory of the bowling ball.

In other words, the bowling ball is hardly affected by the collision, because it is so much more massive than the baseball, thus carrying more momentum and having very little change in its direction after the collision, as opposed to the baseball being sent in a completely opposite direction of which it was rolling before the collision.

yes

force down in newtons = (mass * acceleration due to gravity) constant

force up in newtons = ( velocity^2 * drag coefficient) increases with velocity until terminal velocity reached, forces balance , no further acceleration.

if mass(m) and terminal velocity(tv) are known, drag coefficient(dc) can be calculated.

if : (m * g) = (tv^2 * dc)

so: dc = (m * g )/( tv^2)

drag coefficient is dependent on shape and texture, and is exclusive to each object.

air resistance to motion increases as to the square of velocity

Both blocks will reach the bottom of the incline at the same time, as they are subject to the same acceleration due to gravity. The mass of the object does not affect the rate at which it accelerates due to gravity.

If the bag is sliding across the countertop (i.e., the same surface of the bag is always in contact with the counter), then no. Rolling friction is only relevant when the surface of an object in contact with the surface it moves across always changes.

The definition of force, first proposed by Isaac Newton, is mass times acceleration.

A force caused by gravity is known as a "gravitational force".

It can be measured in any convenient unit of force.

Many people call it "weight" and describe it in pounds or ounces.

What do you mean.If u mean gravitational force then gravitational force never changes in physics it is consider -9.8N the negative meaning downward and (N) meaning newtons, which is a force. Yet if you mean weight then that would be F=MA which is force equals mass x acceleration and in a free body digram that doesn't have a natural force or tension or in other words free falling then the force acting on it would be the kilograms which is represent as mass x the acceleration which would be represented as gravity. that would give you the force downward. which coincidently is your weight.

The equation for static friction is given by: f_s ≤ μ_s * N, where f_s is the static frictional force, μ_s is the coefficient of static friction, and N is the normal force acting on the object.