1. Explain in your own words what the expected values of the horizontal and vert

Question

1. Explain in your own words what the expected values of the horizontal and vertical components of the acceleration are, and what the physical cause(s) behind these individual 2. Is the horizontal component of the velocity changing in time? Why/why not? Is the vertical 3. A ball leaves a 98.5-cm high table with an initial horizontal velocity of 0.8 m/s. Calculate the 4. Refer to the figure on the next page. Find a formula for the horizontal distance d in terms of 5. Calculate the horizontal distance d for the situation in Question 3. acceleration components is (are) component of the velocity changing in time? Why/why not? time required for the ball to fall to the ground. v,, h, and the acceleration of gravity g

Explanation / Answer

Starting with part 2)

2) For a ball undergoing projectile motion, there is no accleration acting alomg horizontal direction, therefore there is no change in horizontal velocity , while the vertical motion isnunder the influence of acceleration due to gravity, therefore velocity change swith time,

3)h = 1/2 gt^2

t = sqroot ( 2h/g) = sqroot ( 2x 0.985 /9,8) -=0.448 seconds apprx

4)t = sqroot ( 2h/g)

d = vs t = vs ( sqroot ( 2h/g))

5) d = 0.8 ( 0.448)= 0.358 m apprx

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