If the speed of an object does NOT change, the object is traveling at uniform speed.
Answer:
its The rolling friction is greater than the force of the car’s weight against the hill.
and A force was required to start the car rolling.
Explanation:
Answer:
15.61 m/s^2
Explanation:
From 3 rd equation of motion
s=ut+1/2at^2
given s = 30
u= 0 ( as body was at rest)
t= 1.96s
30=0*1.96+1/2a(1.96)^2
30=0+1/2a(1.96)^2
a=2*30÷(1.96)^2
a= 15.61 m/s^2 (approx)
<span> In 1 day there are 24 hours x 60 min/hour x 60 seconds/min = 86 400 seconds
So divide 9.39 x 10^9 by 86 400 to determine the # of days there are
= (9.39 x 10^9) ÷ (8.64 x 10^4)
= (9.39 ÷ 8.64) x (10^9 ÷ 10^4)
= 1.0868055556 x 10^5
= 108 681 (nearest whole day) </span>
So, the weight is supported by the tension in the two wires, but only part of the tension goes in holding the body: the vertical component.
If the angle between the ceiling and the wire is 40 deg, then the vertical component is
T_y = T * sin(40),
There are two wires, so together they do
2*T*sin(40)
And all this holds the weight of the body, so:
2*T*sin(40)=150 ----> T = 75/sin(40)~116.68 N,
Notice how it is larger than 150N (both wires is ~ 233 N), as the angle becomes smaller, there is less tension that is vertical, so one needs more tension to make the vertical component as large as (half) the weight of the body
Hope it helps!
