pacecraft accelerates at a rate of 20.0 m/s². a) How much time is required for its speed to increase from 7.0 x 10³ m/s to 8.0 x 10³ m/s? b) How far does the craft travel during this time?
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- A rocket leaves its platform with acceleration ⃗ a= ( 4.00 ^i+2.00 ^j ) m/s2 and initialvelocity v0= ( 8.00 ^i+12.0 ^j ) m/s for 5.00 seconds. After this 5.00 second interval, the rocket’sengines are turned off, and the rocket then travels as a projectile.a. Determine how long the rocket is in the air.b. What is the rocket’s velocity vector (in unit-vector notation) just before it hits theground?I just wanted to make sure I did this right a) What is the car’s average speed, in km/h, from Hither to Yon for the first part of the trip? G: △d=450Km △T=4.50hr U: v E v=△d△t S v=450km4.50hr S the average speed from Hither to Yon is 100km/h b)How long, in hours, did it take for the car to return to Hither from Yon? G: △d=90.0km/h V=100km/h U: △t E △t=△dV S △t=90.0km100km/h S It took 9.0hr to get back to Hither from Yon c) What is the average velocity of the car for the entire (whole) journey, from Hither to Yon, and back to Hither? G △d =450km + 450km = 900km △T=4.50hr+4.50hr=9.0hr U: V E v=△d△t S v=900km9.0hr S the average velocity for the entire journey is 100km/hrA spacecraft starts from rest, and makes a journey to a destination 355000 km from its starting point. It does so by accelerating at a constant rate of 14.76 m/s^2 up to the midpoint of the journey, and then decelerates at the same constant rate of 14.76 m/s^2 for the second half of the journey, ending at rest. How long did the entire journey take? a. 3 hr 20 min b. 2 hr 43 min c. 1 hr 56 min d. 6 hr 41 min