To find the x component use the following formula, where Ф = theta = the angle 'a' makes with the x axis.
i THINK question 18 is (b) and 19 are (A)
Answer: B 1/5, D .20
hope this helps let me know if it's wrong
<span>The acceleration of an object is directly proportional to the force applied to it and .... Calculate the acceleration if you push with a 20-N horizontal force on a 2-kg .... If a 1-N net force accelerates a 1-kg mass at 1 m/s2, what is the acceleration ... 30 000 kg, in takeoff when the thrust for each of its four engines is 30 000 N?</span>
initial velocity = 0 = v₍i₎
final velocity = ? = v₍f₎
t = 12 sec
Acceleration = 4m/s²
First we have to find the distance d, for this we use the
formula,
D = v₍i₎t + 1/2at²
D = 0(12) + ½ (4)(12)²
Distance = d = 288 m
Now to find the Vf use the formula,
V₍f₎² = v₍i₎² + 2ad
V₍f₎² = (0)2 + 2(4)(288)
V₍f₎² = 2304
V₍f₎ = 48 m/s
so the velocity at the end of 12 sec is 48 m/s