please check these answers for me
When an object is moving with uniform circular motion, the centripetal acceleration of the object
a. is circular
b. is perpendicular to the plane of motion
c. is zero
d. is directed toward the center of motion
D
What is the term for the net force directed toward the center of an object's circular path?
a. circular force
b. centrifugal force
c. centripetal force
d. orbital force
C
Which of the following can be a centripetal force?
a. friction
b. gravity
c. tension
d. all of the above
D
When an object is moving with uniform circular motion, the object's tangential speed
a. is circular
b. is perpendicular to the plane of motion
c. is constant
d. is directed toward the center of motion
i'm not really sure about this one..
thanks :)
I don't see how friction can be a centripetal force. It opposes the direction of motion. Gravity and tension both can be centripetal forces.
For the last question, the speed is constant (c). The answer "a" looks tempting, but speed does not have a shape.
Your other answers are correct.
Your answers for the first three questions are correct.
For the last question, the correct answer is (c) is constant. When an object is moving with uniform circular motion, its tangential speed remains constant. This means that the object is moving at a constant speed along the circumference of the circle. The direction of the tangential speed is always tangent to the circle, and it is not directed toward the center of motion.
The correct answers are:
1. When an object is moving with uniform circular motion, the centripetal acceleration of the object
- The correct answer is (d) is directed toward the center of motion.
To determine the centripetal acceleration, you can use the formula:
ac = v^2/r.
In this formula, v represents the object's velocity, and r represents the radius of the circular path. Since the acceleration is directed toward the center of the motion, the correct answer is (d).
2. What is the term for the net force directed toward the center of an object's circular path?
- The correct answer is (c) centripetal force.
The centripetal force is the force that acts on an object to keep it moving in a circular path. It is always directed toward the center of the circular path. The term "centripetal" comes from Latin words meaning "center-seeking." So, the correct answer is (c).
3. Which of the following can be a centripetal force?
- The correct answer is (d) all of the above.
A centripetal force can be any force that is directed toward the center of an object's circular path. The three options mentioned (friction, gravity, and tension) can all act as centripetal forces depending on the specific situation. Friction can provide the centripetal force for a car going around a curve, gravity is the centripetal force that keeps planets in orbit around the sun, and tension can act as the centripetal force in situations such as a ball on a string being swung around in a circle. Therefore, the correct answer is (d).
4. When an object is moving with uniform circular motion, the object's tangential speed
- The correct answer is (c) is constant.
In uniform circular motion, the object moves in a circle at a constant speed. This means that the object's tangential speed remains unchanged throughout its motion. Tangential speed refers to the speed at which the object is moving along the tangent to its circular path at any given point. Since the speed remains constant, the correct answer is (c).
I hope this helps! Let me know if you have any further questions.