1) evaluate the change of motion in the following cases in which the forces on an object change from balanced to unbalanced!
A) The brake of a car parked on a hill is released.
B) A skydiver falling at a constant speed opens her parachute.
C) A boat moving at a constant speed of 44 km/h enters a crosswind.
8.1
1) select the quantity that has changed- velocity or speed- for a car that travels north at 88 km/h and then turns east while continuing to move at 88 km/h. EXPLAIN YOUR ANSWER
2) Infer how distance and speed in the motions of clock parts are usedd to measure time.
3) Explain how you can use the speedometer and a clock to tell how far you've traveled in a car if the car's odometer is not working. (Hint: Assume you are traveling at a constant velocity.)
THANK YOU SOO MUCH THESE ARE THE ONLY ONES I NEED HELP WITH ITS OUT OF A PACKET OF 100 QUESTIONS... SOO I DID PRETTY GOOD TIL THESE QUESTIONS POPPED UP! =)1) evaluate the change of motion in the following cases in which the forces on an object change from balanced?A) moving to not moving? no velocity to velocity. will probably accelerate down the hill until it reaches some kind of terminal velocity.
B)accelerating downward. when the chute opens it stops accelerating and travels downward at a constant velocity.
C) traveling in one direction but the wind pushes the boat to the side, the two vectors add to a diagonal line.
8.1
1) speed is the same--number didn't change
velocity changed since the direction changed.
2) d=vt t=d/v. the speed of the rotation of the gears with the size of the gears? weird question
3) the speedometer will give the %26quot;v%26quot;. Use the clock to measure how much time has elapsed.
d=v*t. you basically multiply the two numbers.
this is how old school submarines new how far they had traveled.
