A negatively charged particle is attracted to(1 point) Responses negatively charged particles. negatively charged particles. all particles that are located close by. all particles that are located close by. only particles that are large. only particles that are large. positively charged particles.
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positively charged particles.
he _______ force is a noncontact force that is created by the movement of an electrical charge.(1 point) Responses gravitational gravitational resistance resistance centrifugal centrifugal electromagnetic electromagnetic
electromagnetic
Nora tied a string around a tennis ball, and then she swung it in a circle in front of her to demonstrate a planet orbiting the Sun. She explained that her hand represented the Sun, the ball represented a planet, and the string kept the ball from leaving the "orbit" around her hand. Why doesn't the string work in the same way as gravity? (1 point) Responses The string only pulls one way; gravity pulls both ways. The string only pulls one way; gravity pulls both ways. The string holding the ball in orbit is a contact force; gravity is a noncontact force. The string holding the ball in orbit is a contact force; gravity is a noncontact force. The string keeps the distance between the bodies the same; gravity makes the distance vary. The string keeps the distance between the bodies the same; gravity makes the distance vary. There is no difference between the two systems.
The string holding the ball in orbit is a contact force; gravity is a noncontact force.
Astronauts on the Moon can jump higher than if they were on Earth. This is because (1 point) Responses there is no friction on the Moon there is no friction on the Moon Newton's laws of motion do not apply to the Moon. Newton's laws of motion do not apply to the Moon. the astronauts are less massive on the Moon. the astronauts are less massive on the Moon. the Moon is less massive than the Earth.
the Moon is less massive than the Earth.
An object has balanced forces acting on it. Which of the following describes the result these balanced forces have on the object?(1 point) Responses It remains at rest or moves at constant speed in the same direction. It remains at rest or moves at constant speed in the same direction. It remains at rest or speeds up in the same direction. It remains at rest or speeds up in the same direction. It speeds up in the same direction or moves at constant speed. It speeds up in the same direction or moves at constant speed. It speeds up in the same direction or slows down.
It remains at rest or moves at constant speed in the same direction.
An object's motion changes(1 point) Responses when the forces acting on the object remain balanced. when the forces acting on the object remain balanced. if the object is at rest when a force acts upon it. if the object is at rest when a force acts upon it. when there are no forces acting upon it. when there are no forces acting upon it. if a nonzero net force is applied to the object.
if a nonzero net force is applied to the object.
1 answer