Inertia
The acceleration vector of a person on spinning Earth points towards the center of Earth due to gravity. Additionally, this acceleration vector is perpendicular to the direction of the person's velocity as they move along Earth's surface.
Yes, a person running in a circular track at a constant speed of 7mph is an example of constant velocity and zero acceleration. While the person is changing direction, their speed remains constant, resulting in a steady velocity. Acceleration would only occur if there were a change in speed or direction.
If the person is walking, after electric impulses tell your feet to move, muscles contract. Your feet, relative to the floor accelerate the rest of your body ahead of them, by means of friction. Too much acceleration can crush a person though, something like 12g?
Linear motion is motion in a straight line, such as a dragster heading down the track, or a person walking down the sidewalk. Circular motion is motion in a circle, such as a yo-yo swung around someones head, or a car making a turn. In physics, while these two categories of motion exist, in most cases outside textbook examples, an objects motion will include both types of motion at once.
Even though the person is moving at a constant speed, they are changing direction constantly as they go around the track. Since acceleration is defined as any change in velocity, and velocity includes both speed and direction, the person running on a circular track is experiencing acceleration.
False
This sensation is caused by the centrifugal force, which is a pseudo force experienced in a rotating reference frame. As the person accelerates in a curved path, their inertia wants to keep them moving in a straight line, causing them to feel a perceived force pushing them away from the center of the circular path.
Yes, a person riding a Ferris wheel experiences acceleration. Even though the speed of the person may remain constant, the direction of their velocity is constantly changing as they move along the circular path, resulting in centripetal acceleration.
True. On a merry-go-round, a person is constantly changing direction as the ride rotates. This is because the person is moving in a circular path, and the direction of their motion changes as they go around the center of the ride.
True. A person on a merry-go-round is constantly changing direction as the ride rotates. The merry-go-round's circular motion causes the person to experience a continuous change in the direction they are facing. As the ride spins, the centripetal force acts on the person, pulling them towards the center of the circular path, leading to a constant change in their orientation.
The acceleration of a merry-go-round changes because acceleration measures a change in velocity, not just speed. In the case of the merry-go-round, even though the speed may stay constant, the direction of the velocity is constantly changing as the object moves in a circular path, resulting in acceleration due to the change in direction.
true:apex