Question

compare and contrast the effects of the following changes in motion.

• linear acceleration of an object in the direction of motion over 10 seconds at 3 m/s².
• centripetal acceleration of an object in motion over 10 seconds at 3 m/s².

(1 point)
the acceleration vectors are identical because they have the same direction.
the acceleration vectors are identical because they have the same magnitude.
the first increases the speed of the object in the direction of motion. the second increases the object’s speed while also changing its direction.
the first increases the speed of the object in the direction of motion. the second does not change the object’s speed but will cause it to turn along a circular path.

Explanation:

Linear acceleration in the direction of motion increases the object's speed in that direction as it acts along the straight - line path of motion. Centripetal acceleration acts perpendicular to the velocity of an object in circular motion. It changes the direction of the object's velocity vector to keep it moving in a circular path without changing the object's speed (magnitude of velocity).

Answer:

The first increases the speed of the object in the direction of motion. The second does not change the object’s speed but will cause it to turn along a circular path.