Acar traveling at a rate of 30 ft/sec is approaching an intersection. when the car is 120 ft from the intersection, a truck traveling at a rate of 40 ft/sec crosses the intersection. if the roads are at right angles to each other, how fast are the car and the truck separating 2 seconds after the truck crosses the intersection?

how fast are the car and the truck separating 2 seconds after the truck crosses the intersection: = 140ft

Explanation:

A car traveling at a rate of 30 ft/sec is approaching an intersection.

When the car is 120 ft from the intersection,

a truck traveling at a rate of 40 ft/sec crosses the intersection.

If the roads are at right angles to each other,

how fast are the car and the truck separating 2 seconds after the truck

for the car,

speed = distance/time

30 = 120/time

when the car is at 120ft to the intersection, he will used  t = 4sec to the intersection

for every 1sec, the car move 30ft

for the truck

speed = distance/time

40 = d/2sec

the distance of the truck at 2sec = 80ft

how fast are the car and the truck separating 2 seconds after the truck crosses the intersection: = 140ft

the car will be 60ft to the intersection and the truck will be 80ft after the intersection

therefore, the distance between the car and truck = 60+80 = 140ft

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right