Police use the formula s=√30fd to estimate the speed of a car just before it skids. In this formula is the speed of the car, is the distance the car skidded in feet, and represents the coefficient of friction. The value of depends on the condition and type of road surface. We know when the road is wet concrete and 0.95 on a dry concrete road. You are given the job of investigator! You will be given the measurements of two skidding cars involved in an accident. Determine the speed of each car prior to the skid. Car A: Skid was measured to be 32 feet.Car B: Skid was measured to be 43 feet. a. What is the exact speed in radical form and exponential form? b. What is the estimated speed rounded to the nearest tenth? c. You know that you should keep a safe following distance when following other cars on a roadway. How long should your following distance be if both you and the car in front of you are traveling at 55 mph?
Answers
Answer:
ፖሊስ የመኪናውን ፍጥነት ከማሽከርከሙ በፊት የመኪናውን ፍጥነት ለመገመት ቀመር s = √30fd ይጠቀማሉ። በዚህ ቀመር የመኪና ፍጥነት ነው ፣ መኪናው በእግሮች ተንሸራቶበት ያለው ርቀት ነው ፣ እና የትብብር ቡድኑን ይወክላል
Answer:
1.
a force can move a stationary object
a force can stop a moving object
it can change direction of a object
force can chang shape and size of an object
2. contact force : a force which can be excerted by an object on another object only through 'physical touch' is called a contact force.
non contact : a force can be excerted by an object on another obect even from a distance is called non contact force
3. pressure is the force acting on a unit area of the object. the SI unit of pressure is newton per sq (N/m²)
8. atmospheric pressure is the air pressure which is excerted by the weight of air present in atmosphere.
10. it acts on opposite direction
Step-by-step explanation: