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Two - forces act in pairs. If object "A" acts on object "B", the object "B" will also act on object "A".
In many practical situations, there may be additional forces involved. For example, if an object is at rest despite the fact that a force acts on it, then it is obvious that an additional force acts on the same object, and in the opposite direction. In such cases, there are at least four forces involved, since according to Newton's Third Law, there must be an opposite force for each of these two forces. (Note that in Newton's Third Law, the two forces act on DIFFERENT objects, so the two forces that hold an object in balance do not quality as a pair of forces according to Newton's Third Law.)
What else can I help you with?
What force acts on the Moon to keep one hemisphere facing the Earth?
Tidal forces made it rotate that way. We can assume that in the far past, it may have rotated faster; tidal forces made it slow down. (In principle, it's also possible that it rotated slower and that tidal forces made it speed up.) Similarly, the Earth is rotating slower and slower; one far day in the future, the Earth will always show the same side to the Moon. Of course, once an object is rotating at a certain speed, it requires no force to make it continue rotating.
How many people have experienced a hurricane once in their lives versus how many people have experienced a tornado once in their lives?
there have been more in a hurricane
Do snowflakes continue to grow once they touch the ground?
No, snowflakes do not continue to grow once they touch the ground. Once they land, they can be further compacted by footsteps or other forces, but they do not continue to accumulate additional ice crystals.
What are the forces used on a marble run?
In a marble run, the primary forces at play include gravity, friction, and inertia. Gravity pulls the marbles downward, causing them to accelerate along the track. Friction between the marbles and the surface of the run can slow them down, while inertia keeps them in motion once they are rolling. The design of the run can also influence these forces, affecting the speed and path of the marbles.
Why does a parachutist have two terminal velocities?
Because the drag coefficient increases when the chute opens..Force down (newtons) = mass (m) * acceleration due to gravity (g)Force up (newtons) = velocity2 * drag coefficient.Terminal velocity is where up and down forces balance.Say mass (m) = 100 kg, g = 9.82, then force down = m * g = 982 newtons, say terminal velocity (v) prior to chute opening = 70 m / s, then force down = force up so 982 = v2 * drag coefficient, so drag coefficient = 982 / 4900 = 0.2without chute.Terminal velocity with chute open, say 8 metres / sec, so drag coefficient= 982 / 64 = 15.34 with chute open.
In newton's 3rd law of motion how many forces always act at once?
Go to sciencespot.net
How many forces act on a body when a body is thrown upward?
Once it is in the air, the main forces are gravity, and air resistance.
How many times is the word 'Love' mentioned in the Old Testament?
Once Love is Always... Always is Love mentioned!!!
How many times can a 60years old man intercourse with his wife?
Once a king always a king once a knite's enough
How many forces acting on a catapult?
A catapult typically experiences two main forces: the tension force generated by the pulling back of the catapult arm and the gravitational force acting on the projectile once it is launched. Additional forces may include air resistance and friction.
How many retired marine corps officers are there?
none, once a marine, always a marine.
A difficulty in understanding the Columbian exchange is what?
Things once unknown now seem like they have always been a part of many cultures.
What does once a teacher always a teacher?
it means that once a teacher is a teacher once, even after he/she retires, they still feel like a teacher at heart.
How do you measure aerodynamic forces in a homemade wind tunnel?
you could use a spring behind your object, and calculate inline reaction force from deflection. it will be essential the wind speed is accurately measured force will represent wind velocity squared *drag coefficient , once calculated the drag coefficient can be used elsewhere, in acceleration calculations for instance. measuring forces versus wind speed should produce a exponential graph in the form f = v^2 as drag force is proportional to square of velocity if you translate the action into freefall , at terminal velocity the forces balance, down = mass * gravity acceleration ( newtons) up = velocity ^2 * drag coefficient (newtons)
What was A difficulty in understanding the Columbian exchange is that?
Things once unknown now seem like they have always been a part of many cultures. Apex Class.
If the bikers are applying unbalanced forces to their bikes to move them?
They have to get the bike started by using an engine that has to make the forces unbalanced to get the bike to progress forward and once you have reached a constant speed then you will become unbalanced once you have accelerated once again.
Why does a person n earth always sees the same side of the moon?
The Moon rotates in such a way that it always shows us the same side - it takes 27 days to go once around the Earth, and 27 days to rotate around its own axis. The reason for this is that the Moon's rotation, which was probably much faster initially, slowed down, through tidal forces from the Earth - just as the Earth's rotation is currently slowing down, due to tidal forces from the Moon. Many moons in the Solar System have this bound rotation - they rotate once every time they go around their planet.
