The Delta rocket used to launch the rovers to Mars had a mass of 285,000 kg at liftoff. This includes the mass of the 9 solid rocket motors (SRMs) attached to the outside of the main rocket engine. The thrust of the main rocket was about 890,000N and each of the SRMs generated a thrust of 480,000 N, but only 6 of the SRMs were used in the first minute of flight.
(a) What was the liftoff acceleration of the rocket?
(b) At 66 seconds into the flight, the 6 active SRMs are jettisoned. The measured velocity at that moment was 1030 m/s. What is the rocket's average acceleration over the first 66

Question

The Delta rocket used to launch the rovers to Mars had a mass of 285,000 kg at liftoff. This includes the mass of the 9 solid rocket motors (SRMs) attached to the outside of the main rocket engine. The thrust of the main rocket was about 890,000N and each of the SRMs generated a thrust of 480,000 N, but only 6 of the SRMs were used in the first minute of flight.
(a) What was the liftoff acceleration of the rocket?
(b) At 66 seconds into the flight, the 6 active SRMs are jettisoned. The measured velocity at that moment was 1030 m/s. What is the rocket's average acceleration over the first 66

anonymous · Answer

**over the first 66 seconds?