A rocket of mass 5000 kg accelerates upward at 4 m/s². Taking g = 10 m/s², the THRUST (upward force) from the rocket engines must equal:
A50,000 N
B20,000 N
C70,000 N
D100,000 N
Answer & Solution
Correct answer: C. 70,000 N
Net upward force = thrust − weight = ma. Weight = mg = 5000 × 10 = 50,000 N (down). Required net force for upward 4 m/s² = ma = 5000 × 4 = 20,000 N. So thrust = weight + net force = 50,000 + 20,000 = 70,000 N.
Related questions
Two stones of very different mass are released from the same height with air resistance igAccording to Newton's law of universal gravitation, the force between two point masses depWhich statement is true of the two forces in a Newton's third law action-reaction pair?A fly hits the windscreen of a moving car. Compared with the force the fly exerts on the wA person stands on a bathroom scale inside a lift. The lift begins to accelerate downwardsA lift hangs on a cable and moves upwards at a constant velocity. What is the resultant foIn Newton's second law, how is the acceleration of a body related to its mass?What name is given to the property that makes an object keep doing what it is already doin