Problem a 493 times 105-kg lunar landing craft is about to, Ask an Expert

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Problem: A 4.93 × 10⁵-kg lunar landing craft is about to touch down on the surface of the moon, where the acceleration due to gravity is 1.60 m/s². At an altitude of 284 m the craft's downward velocity is 15.7 m/s. To slow down the craft, a retrorocket is firing to provide an upward thrust.

Part A: Assuming the descent is vertical, find the magnitude of the thrust needed to reduce the velocity to zero at the instant when the craft touches the lunar surface.

I need help to find the magnitude of the thrust needed to reduce the velocity to zero.

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