You decide to travel by car for your holiday visits this year. you leave early in the morning to avoid congestion on the roads. this enables you to drive at a comfortable speed of =67.1 mphv1=67.1 mph for =1.70t1=1.70 hours. however, after this time, you unexpectedly come to a stop for =20.0 min. tstop=20.0 min. traffic starts moving again and you finish your travel at =55.8 mphv2=55.8 mph for an additional =1.70t2=1.70 hours. there are 16091609 meters in one mile. what was the total distance traveled?

1400 kg car has a speed of 27 m/s. if it takes 7 s to stop the car, what is the impulse and the average force acting on the car?

The energy released by a nuclear fusion reaction is produced when

Learning goal: to understand newton's 1st law. newton's principia states this first law of motion: an object subject to no net force maintains its state of motion, either at rest or at constant speed in a right line. this law may be restated as follows: if the sum of all forces acting on an object is zero, then the acceleration of that object is zero. mathematically this is just a special case of the 2nd law of motion, f⃗ =ma⃗ , when f⃗ =0. when studying newtonian mechanics, it is best to remember the 1st law in two ways: if the net force (i. e., sum of all forces) acting on an object is zero, the object will keep moving with constant velocity (which may be zero). if an object is moving with constant velocity, that is, with zero acceleration, then the net force acting on that object must be zero. complete the following sentences to see if you can apply these ideas. part a if a car is moving to the left with constant velocity, one can conclude that