<span>Rails are made of metal, and it expands and contracts as the temperature outside changes. If rails were to exactly butt up against each other, their expansion could cause their shape to change or cause the rail to buckle. Having some play in the joint and bolt-hole allows for some �give� in this expansion/contraction. You see the same effect in sidewalks where the concrete is formed in sections with gaps in between�normal expansion of concrete could cause it to crack if there is no �give� between the pieces. </span>
A)
0.532 m = 0.202v_0 + ½(-9.81 m/s²)(0.202 s)²
v_0 = 3.62 m/s
B)
0.532 m = ½(v + 3.62 m/s)(0.202) s
v = 1.65 m/s
C)
At the highest point v = 0, so
0 = (1.65 m/s)^2 + 2(-9.81 m/s²)d
d = 0.139 m
when you are travelling downhill on a roller coaster, you experience a light felling in your stomach because, at the time of travelling downhill for a very little duration the roller coaster is falling freely on the earth, and for that time period there is no gravity works on you, and you feel the condition of weightlessness that's why you feel light in your stomach.
Answer:
The magnitude of the centripetal force to make the turn is 3,840 N.
Explanation:
Given;
radius of the cured road, r = 400 m
speed of the car, v = 32 m/s
mass of the car, m = 1500 kg
The magnitude of the centripetal force to make the turn is given as;
where;
Fc is the centripetal force
Therefore, the magnitude of the centripetal force to make the turn is 3,840 N.