Speed is defined as the distance per unit time.
So we can calculate the speed by :
S = Distance traveled/Time taken
S = 80 /2
S = 40 miles/hour
Truer words were never written. Forces do indeed always act in pairs.
Answer:240W
Explanation: from kinematics x=a*t*t/2 so we can get acceleration:
10=a*5*5/2 ; a = 0.8m/s2
from newton's law we get the force that moves the car:
F=m*a , F= 1500*0.8=1200N
now we get the total work done by the force F:
W =Fd =1200*10=12000J
The power is P=W/t :
P= 12000J/ 5s = 240W =0.32HP
