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Question $1$

A projectile is fired up an incline $($incline angle $)$ with an initial speed $v_i$ at an angle ${}_i$ with respect to the horizontal as shown in Figure.

$($Take $g=10\frac{m}{s^2}.$ Please mark the closest answer as correct answer$)$ Find how many seconds later it is shot, projectile strikes the incline at point A

$($a$)1\mathrm{.}4$ s

$($b$)3\mathrm{.}9$ s

$($c$)6\mathrm{.}3$ s

$($d$)8\mathrm{.}6$ s

$($e$)4$ s

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Question $3$

In uniform circular motion, which is true about the acceleration vec$(a)$ and the position vector vec$(r)?$

a$)$ vec$(r)$ is always radially outward and vec$(a)$ is always radially inward.

b$)$ vec$(r)$ is always tangent to the path and vec$(a)$ is always radially outward.

c$)$ vec$(a)$ is always tangent to the path and vec$(r)$ is always radially inward.

d$)$ vec$(r)$ is always tangent to the path and vec$(a)$ is always perpendicular to the path.

e$)$ vec$(a)$ is always tangent to the path and vec$(r)$ is always radially outward.

Your answer:

A

B

C

D

E

Clear answer