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Q: An object thrown into the air stops at the highest point in its path Is it in equilibrium at this point?

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No, the acceleration at the highest point is never 0.

no, it still has the force of gravity on it

Zero

Yes. To be in equilibrium, the forces must not be perpendicular - they must point in opposite directions.

Equilibrium is complete balance among everything.

crest

juda

When the stone reaches its highest point, earth's gravity ensures it has to come down.

0 zero

Yes. A typical example is an object thrown directly up - this will happen when it is at its highest point, just before it falls back down again.

An object at its highest point has the greatest potential energy. Only moving objects have kinetic energy at the moment they are in motion.

Equilibrium means that an object will stay at rest or not accelerate; the conditions are the net force is zero and the net moment about any point is zero.

A the highest point its velocity will be zero.

The highest point of the pendulums swing is when the potential energy is at its highest and the kinetic energy is at its lowest. Kinetic energy is at its highest when at the lowest point of its swing, or equilibrium position, this is when the potential energy is at zero.

for an object in equilibrium, the sum of clockwise moments about any point equals the sum of anticlockwise moments about the some point.

0 ms-2 upwards

The acceleration is always -9.81 m/s^2. At its highest point the velocity is zero, but its acceleration is always constant.

At the highest point

Yes, it is. Consider a ball thrown into the air. At the highest point of the arch its velocity is zero, yet it's constantly accelerated by Earth's gravitation.

Equilibrium is the point where demand = supply

The highest point is the point where the ball's velocity transitions from upward to downward. At that instant, the ball's speed, velocity, momentum, and kinetic energy are all exactly zero.

stability

i'm not sure what u mean. the kinetic energy will be the highest at the point of impact with the groud

For example, an object thrown upwards, when it is at its highest point. This situation is only possible for an instant - if the acceleration is non-zero, the velocity changes, and can therefore not remain at zero.

The only force acting on a projectile once launched is gravity. So the acceleration of any object launched at any angle is the acceleration due to gravity, -9.8m/s2.

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