Ch 3: Vectors and Motion in Two Dimensions

Question 1

What is the formula for acceleration on a ramp?

Answer 1

a_{x =} + g sin θ

Question 2

Define centripetal acceleration.

Answer 2

An acceleration whose vector points towards the center of the circle.

Question 3

What is a radian defined as?

Answer 3

An arc of a circle with the same length as the radius of that circle subtends an angle of 1 radian. The circumference of half that circle subtends an angle of 1π radian, and the full circumference subtends an angle of 2π radians.

Question 4

A projectile is an object that moves in ___ ___________, under the influence of _______ and nothing else. As long as we can neglect air resistance, any projectile will follow the same type of path.

Answer 4

two dimension

gravity

Question 5

For an object in projectile motion, the initial horizontal velocity has __ _________ over the vertical motion, and vice versa. This is a general rule for any projectile motion: The horizontal and vertical components of an object undergoing projectile motion are independent of each other.

Answer 5

NO influence