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inna [77]
4 years ago
10

Hey family takes a car trip and they travel from an hour at 80 KM/h and than for 2hourse at 40 km/h finf the average speed durin

g the trip
Physics
1 answer:
bazaltina [42]4 years ago
6 0

Average speed  =  (total distance)  /  (total time)

Distance during the first hour = (80 km/hr) x (1 hr)  =  80 km

Distance during the next 2 hours = (40 km/hr) x (2 hrs)  =  80 km

Total distance  =  80 km + 80 km  =  160 km.

Total time = 1 hr + 2 hrs  =  3 hrs

Average speed  =  (160 km) / (3 hrs)  =  (53 and 1/3) km/hr.
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Answer:

xf = 5.68 × 10³ m  

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solution

firsa we get here origin (0,0) to where the shell is launched

xi = 0                            yi = 0

xf = ?                            yf = ?

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and

now we solve for y motion: that is

yf = yi + vyi × t + 0.5 × ay × t ²     ............2

put here value and we get

yf = 0 + (290 m/s) × sin(57) × (36.0 s) + 0.5 × (−9.8 m/s2) × (36.0 s)  ²

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