During a family trip to Laura's grandmother's house, the family cast traveled a distance of of 8 miles in 24 minutes. During the

trip they stopped for two red lights. Which statement correctly describes the motion of the car? And why?
A) The Car Traveled at an acceleration of 0.83 mi/h
B) The Car Traveled at a constant acceleration of 0.83 mi/h
C) The Car Traveled at an average speed of 20 mi/h
D) The Car Traveled at an constant speed of 20 mi/h

Physics

You might be interested in

Consult Conceptual Example 9 in preparation for this problem. Interactive LearningWare 6.3 also provides useful background. The

Keith_Richards [3271]

Answer:

11.56066 m/s

Explanation:

m = Mass of individual

v = Velocity of individual = 13.4 m/s

g = Gravitational acceleration = 9.81 m/s²

v' = Velocity of the individual after dropping

At the surface, kinetic and potential energy will equalize

$\dfrac{1}{2}mv^2=mgh\\\Rightarrow h=\dfrac{v^2}{2g}\\\Rightarrow h=\dfrac{13.4^2}{2\times 9.81}\\\Rightarrow h=9.15188\ m$

The cliff's height is 9.15188 m

Define fall height as h' = 2.34 m

$\dfrac{1}{2}mv'^2+mgh'=mgh\\\Rightarrow v'=\sqrt{2g(h-h')}\\\Rightarrow v'=\sqrt{2\times 9.81(9.15188-2.34)}\\\Rightarrow v'=11.56066\ m/s$

The person's speed is 11.56066 m/s

3 0

3 months ago

Two basketball players are essentially equal in all respects. (They are the same height, they jump with the same initial velocit

kicyunya [3294]

Boris's reaction time is denoted as t(r), implying that he has not jumped prior to that moment. Therefore, H(b)(t) equals 0
. The vertical displacement is determined simply as
D(t) = H(a)(t)

7 0

3 months ago

The equation for the change in the position of a train (measured in units of length) is given by the following expression: x = ½

Keith_Richards [3271]

(B) (length)/(time³) Explanation: The term x = ½ at² + bt³ should meet dimensional consistency. This means that both bt³ and ½ at² must share the same units, which are length. To find the dimension of b, we rearrange the equation: [x] = [b]*[t]³ leads to length = [b]*time³, hence [b] = length/time³.

6 0

3 months ago

Read 2 more answers

A baseball thrown at an angle of 60.0° above the horizontal strikes a building 16.0 m away at a point 8.00 m above the point fro

Ostrovityanka [3204]

Answer:

a) $v_{o} =16m/s$