1) A tourist from England travels 100 miles from Laramie to Pine Bluffs, then re

Question

1) A tourist from England travels 100 miles from Laramie to Pine Bluffs, then returns to Laramie via Ft Collins traveling 145 miles on the return route. The trip took 4 hours to complete. Calculate the average speed of tourist's car in miles per hour.

2)You push on a 5 Kg mass that is resting on a horizontal surface with a force of 50 N. The horizontal friction force is 20 N. Calculate the acceleration of the 5 Kg mass.

3)A car traveling at 25 m/s ( about 55 mph) crashes into a road barrier and comes to a stop in 0.2 sec. What is the average force in Newtons felt by a 75 Kg person in a set belt?

Explanation / Answer

1)AVG SPEED=TOTAL DISTANCE/TOTAL TIME=245/4=61.25MILES/HOUR

2)FORCE-FRICTION=M*a

5*a=50-20

A=6m/sec^2

3)AVG CCELERATION=V-U/T=25/0.2=125m?SEC^2

AVG FORCE=75*125=9375N

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.