Mathematics, 17.09.2019 15:30 RayshawnBoulware
You are traveling in a car that is moving at a velocity of 20 m/s. suddenly a car 10 meters in front of you slams on its brakes. at the moment you also slam on your brakes and slow to 5 m/s. calculate the acceleration if it took 3 seconds to slow your car down
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Mathematics, 22.06.2019 00:00
Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?
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You are traveling in a car that is moving at a velocity of 20 m/s. suddenly a car 10 meters in front...
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