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Physical Science Homework help?
I don't need really need the answers, just help figuring out what formulas I need to use.Here are the three problems:17. A car is moving at 10 meters per second it begins to be celebrated at 2.5 meters per second squared. How long does the car take to reach a speed of 25 meters per second? How far does it go during this period?35. A ball is thrown vertically upward with an initial speed of 30 meters per second. How long will it take the ball to reach the highest point in its path? How long will it take the ball to return to its starting place? What will the ball’s speed be there?57. A parachutist whose total mass is 100 kilograms is falling at 50 meters per second when her parachute opens. Her speed drops to 6 meters per second in two seconds. What is the total Force her harness had to withstand? How many times the weight is this force?
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Tutor has posted answer for $10.00. See answer's preview
** have *** ********* kinematic ********* v= * *** where * ** the ******* velocityv ** the ***** velolcity * ** *** ************ and t is *** time ***** *** the ************ ** reach * ***** ******** of v **** ** initial ******** ** * ** ** * *** ******* Eq 1 ** **** **** *** ********* formula :- s = ** * **** ** ------- ** **** ******** *** sides ** ** *** **** v^2 * (u *** )^2⇒ *** * *** ******** + ***** **** + ******* /2 * ** * ****** *** * ***** ***** *** ----Eq * **** ** ****** ** ***** * ** * **** ** ************ ****** ** Eq * ** ** * ** **** v^2 **** + 2a(ut +at^2 *** * *** * ****** ** have the ******* ***** * *** ** * a X ****** ** * ***** * ** the distance travelled by the ******* ******** **** is thrown ********** ****** **** ** ******* ***** of 30 meters *** ****** aHow **** will it **** *** ball ** ***** the highest point ** *** **** For ******* **** ******* ** have ** *** Eq * ***** = *** +2 * * * * **** * = ************ * * acceleration *** ** ******* * * 98m/sec^2 ** ***** ** *********** *** * = final velocity which ** ***** to ***** *** **** ***** *** * moment **** ** ******* *** ******* ***** ** ********* long will ** **** *** ball ** return to *** ******** ***** For solving this ******* ** **** ** *** ** * *** 3) * parachutist ***** total **** is *** ********* is ******* ** 50 ****** per ****** when *** ********* opens *** speed ***** ** * ****** *** ****** ** *** ******* * **** ** the total ***** her ******* *** ** ********** *** ******* this ******* we **** ** *** * ********* ****** ** * *** & F * * * A ** ( ***** * **** * Acceleration * ** **** * * ******* ******** *** meters *** second ** ********************* *** ****** *** t * 2 *** ** ** ********* the ***** ** a ** ************ by ************ the ****** ** * v ***** * ** ** 1 and **** ********** *** ****** ** * ie accelaration in *** equation * = * * * ** **** *** value ***** ***** ** the harness b *** **** times *** ****** ** **** ****** ** calculate *** weight ** **** ** use *** ******* * * * x * ***** m ** *** mass(kg * *** * = ************ *** ** ******* ********* * *** * ** = ********** Force = m * * * *** * * * ** **** v * u * at so * * 50 - a x 2 ************* ** *** as *** ********* ***** **** ** ***** is *********** ) ** 2a * **** ** ** * ** ** a * 22 So ***** * m x * * *** * 22 * **** ******* So Force * 2200 * 224 * Weight So ****** ** *** *****
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Tutor has posted answer for $10.00. See answer's preview
**** ******** ******** for *** ****** problem ***** *** *** formulaes ******************* v is ***** ******** U ** ******* ******** * is ************ *** t is **** taken17b)S=So+Ut+1/2at²Where S=final ******** ** is ****** ******** * is initial ******** * is acceleration and * ** time taken35a)V=U ******** * ** ***** velocity * ** ******* velocity * ** ************* and * ** time ****************** T ** **** ** ****** ***** ***** to ****** to *** ******* position * **** ** **** ***** to ***** highest point ************* F ** total ***** m ** mass *** * ** ************* ********* * ** final velocity * ** ******* ******** *** * is **** ****************** * ** ****** * ** mass *** * ** ************* acceleration ****************** * ** ****** ** ***** the ***** ***** ******* **** the ****** ***
