Is it possible to have acceleration without speed?
Yes, an object can have zero velocity and still be accelerating simultaneously.
Can an object change velocity without changing speed?
For constant velocity, there cannot be any acceleration (or change in acceleration, therefore). This means the object cannot change speed or direction. Position is the only thing that changes at constant velocity (velocity or acceleration or higher position derivatives cannot change).
How can acceleration occur when speed is constant?
An object which experiences either a change in the magnitude or the direction of the velocity vector can be said to be accelerating. This explains why an object moving in a circle at constant speed can be said to accelerate – the direction of the velocity changes.
How can an object accelerate?
There are three ways an object can accelerate: a change in velocity, a change in direction, or a change in both velocity and direction.
Can an object be accelerated if it is moving with constant speed?
Yes it is possible that an object is moving with a constant speed and still have an acceleration. 1) A body moving with a constant speed in a circular path have an acceleration as its velocity keeps on changing at every instant due to change in the direction.
Can an object accelerate even if its speed is constant?
Can an object accelerate if it's moving with constant speed? Yup! Many people find this counter-intuitive at first because they forget that changes in the direction of motion of an object—even if the object is maintaining a constant speed—still count as acceleration.
What are 3 ways to accelerate?
THE THREE WAYS TO ACCELERATE
- Acceleration is the rate at which velocity changes.
- In other words speeding up.
- In ways of: Increasing, decreasing, and changing direction.
Nov 18, 2015
Can an object accelerate forever?
So, you can push the throttle as hard as you can withstand being pressed against your driving seat. But since link between force and acceleration breaks on high speeds, you can get your never-ending acceleration, but in ever smaller amounts.
What causes an object to accelerate?
Acceleration and velocity Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e., to change its velocity, at a constant rate. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force.
Why can’t spaceships go faster?
General Relativity states that space and time are fused and that nothing can travel faster than the speed of light. General relativity also describes how mass and energy warp spacetime – hefty objects like stars and black holes curve spacetime around them.
Do you lose speed in space?
As a result, there is essentially zero friction in space to slow down moving objects. Unlike ships in water, a ship in space does not need constant thrust to keep moving forward. A space ship's momentum will continue to carry it forward indefinitely at a constant speed after the engines are turned off.
What force makes an object accelerate?
According to Newton, an object will only accelerate if there is a net or unbalanced force acting upon it. The presence of an unbalanced force will accelerate an object – changing its speed, its direction, or both its speed and direction.
What force causes acceleration?
Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e., to change its velocity, at a constant rate. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force.
Will warp speed ever be possible?
Warp drives are theoretically possible if still far-fetched technology. Two recent papers made headlines in March when researchers claimed to have overcome one of the many challenges that stand between the theory of warp drives and reality.
Is anything faster than light?
Albert Einstein's special theory of relativity famously dictates that no known object can travel faster than the speed of light in vacuum, which is 299,792 km/s. This speed limit makes it unlikely that humans will ever be able to send spacecraft to explore beyond our local area of the Milky Way.
Are bullets slow in space?
So: instantaneously after firing, the speed of a bullet in space and on earth should be the same. The effect of drag on the bullet will slow it down on earth, which the bullet would not feel in space, but for objects the size and shape of a bullet, this doesn't have a very large effect on the speed of the bullet.
Do you age in space?
In space, people usually experience environmental stressors like microgravity, cosmic radiation, and social isolation, which can all impact aging. Studies on long-term space travel often measure aging biomarkers such as telomere length and heartbeat rates, not epigenetic aging.
How does acceleration work?
Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction.
What are the three laws of acceleration?
The laws are: (1) Every object moves in a straight line unless acted upon by a force. (2) The acceleration of an object is directly proportional to the net force exerted and inversely proportional to the object's mass. (3) For every action, there is an equal and opposite reaction.
How can the motion of an object that is not moving change?
An object at rest has zero velocity – and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.
What makes the object accelerate?
An object accelerates when its speed changes or its direction of motion changes or both.
Has NASA created a warp drive?
The same (former) NASA engineer who previously claimed to violate Newton's laws is now claiming to have made a warp bubble. He didn't. Although it was originally a fictional idea, a 1994 paper by Miguel Alcubierre showed how "warp drive" is really possible within general relativity.
How long would it take to travel 70000 light years at warp 9?
Voyager was about 70,000 light-years away from home, and crew would often use "75 years" as the time it would take to get back home at top speed. This means the Voyager series used the old method of Warp calculation. 70,000/9.9753 is roughly 71 years.
What’s the speed of dark?
Darkness travels at the speed of light. More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light.
Is black hole faster than light?
Using NASA's Chandra X-ray Observatory, astronomers have seen that the famous giant black hole in Messier 87 is propelling particles at speeds greater than 99% of the speed of light.
Will guns fire underwater?
If you're wondering how it's even possible to shoot a gun underwater, gunpowder contains oxygen — a key element in the firing process — the gun still goes off exactly as it would on land.
Will a pistol fire in space?
Fires can't burn in the oxygen-free vacuum of space, but guns can shoot. Modern ammunition contains its own oxidizer, a chemical that will trigger the explosion of gunpowder, and thus the firing of a bullet, wherever you are in the universe. No atmospheric oxygen required.
Is an hour in space 7 years on Earth?
The first planet they land on is close to a supermassive black hole, dubbed Gargantuan, whose gravitational pull causes massive waves on the planet that toss their spacecraft about. Its proximity to the black hole also causes an extreme time dilation, where one hour on the distant planet equals 7 years on Earth.
Do astronauts get paid for life?
So, while they may not be paid for life, astronauts do receive many benefits that help offset the risks of their profession. However, astronauts may enjoy many potential financial rewards once they retire.
How do you explain acceleration to a child?
Acceleration is the measurement of change in an object's velocity. When you press down on the gas pedal in a car, the car surges forward going faster and faster. This change in velocity is acceleration.