Explanation:
Given that,
Initial speed of the bus, u = 0
Acceleration of the bus, a = 0.5 m/s²
Let v is the velocity at the end of 2 minutes. The change in velocity divided by time equals acceleration.
So,

Let d is the distance cover during that time. So,

So, the final speed is 60 m/s and the distance covered during that time is 3600 m.
The 3rd one. The question can be tested by a systematic procedure
Answer:
momentum in a body can be calculated using
<em><u>Mome</u></em><em><u>ntum</u></em><em><u>=</u></em><em><u>Mass×</u></em><em><u>V</u></em><em><u>e</u></em><em><u>l</u></em><em><u>o</u></em><em><u>s</u></em><em><u>i</u></em><em><u>t</u></em><em><u>y</u></em><em><u> </u></em>
<em><u>i</u></em><em><u>e(</u></em><em><u>p</u></em><em><u>=</u></em><em><u>m×</u></em><em><u>v</u></em><em><u>)</u></em>
Answer:
A. a = 814.815 ft/s^2.
B. Distance, S = 320 ft.
Explanation:
Equations of motion
i. vf = vi + a*t
ii. S = vi*t + 1/2*(a*t)
iii. vf^2 = vi^2 + 2a*S
Given:
vi = 0 ft/s
vf = 1000 miles/hr
t = 1.8 s
g = 32 ft/ s2
Converting miles/hr to ft/s,
1 mile = 5280 ft
Also, 1 hr = 60 mins * 60s
= 3600 s
Therefore, 1000 miles/hr * 5280 ft/1 mile * 1 hr/3600 s
= 1466.7 ft/s.
A.
Using the i. Equation of motion,
1466.7 = 0 + a*1.8
a = 814.815 ft/s^2
Comparing a to g,
a = (814.815/32) * g
= 25.46 g
B.
Using the ii. Equation of motion,
S = 1/2 * (814.815) * (1.8)^2
= 1320 ft.
It is the second one, it is longitude and moving up and down so its B.