A Chinese rocket has a mass burn rate of 3.8 kg every single second, and the resulting exhaust gas speed is 2.3 × 103 m/s. Determine the magnitude of the engine’s thrust. The thrust is essentially the force exerted, that in turn provides the needed lift.

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car