A large rocket has a mass of 2.00×106kg at takeoff, and its engines produce a thrust of 3.50×107 N . (a) Find its initial acceleration if it takes offvertically. (b) How long does it take to reach a velocity of 120km/h straight up, assuming constant mass and thrust? (c) Inreality, the mass of a rocket decreases significantly as its fuelis consumed. Describe qualitatively how this affects theacceleration and time for this motion

A 0.51 kg football is thrown with a velocityof 18 m/s to the right. A stationary receivercatches the ball and brings it to rest in 0.020s.What is the force exerted on the receiver?Answer in units of N.

When venturing forth on Planet X, you throw a 5.60 kg rock upward at 14.2 m/s and find that it returns to the same level 1.67 s later. A) What does the rock weigh on Planet X?

A 3.0-kg block (A) is attached to a 1.0-kg block (B) by a massless spring that is compressed and locked in place, as shown in the figure. The blocks slide without friction along the x-direction at an initial constant speed of v = 2.0 m/s. At Lee A A 000 B ell time to 0 s, the positions of blocks A and B are %3D 1.2 m, respectively, at which point a mechanism releases the spring, and the blocks begin to XA.i = 1.0 m and xB.i = XB.r oscillate as they slide. If 2.0 s later block B is located at xB.f = 7.5 m, what will be the position xA.f %3D of block A? XA,f

A massive missile has a mass of 1.95 × 106 kg at takeoff, and its engines produce a thrust of 3.9 × 107 N .  (a)  Find its initial acceleration, in meters per second squared, if it takes off vertically. Take up to be positive.   (b) How long, in seconds, does it take to reach a velocity of 120 km/h straight up, assuming constant mass and thrust?

Leaving the distance between the 87 kg and the 772 kg masses fixed, at what distance from the 772 kg mass (other than infinitely remote ones) does the 63.9 kg mass experience a net force of zero? Answer in units of m.

A body weighing 2 kg was acted upon by a horizontal force of 3 N. What speed will the body acquire in 5 s in the absence of friction?

A constant force acts on a 25 kg object and reduces its velocity from 17 m/s to 13 m/s in a time of 8 sec.. Find the force?

A rocket of mass 10^5 kg is launched fromthe surface of the Earth. This is a sketch of the rocket as it’s still in Earth’s atmo-sphere. The rocket is undergoing an accel-eration of 3 m/s^2 upward. There is a forceexerted on the rocket from the thrust of itsengines labeled here as FEngine (you can useFE for short). The rocket is still close to theEarth’s surface, so it is subject to Earth’s gravity, and it is also subject to a substan-tial air resistance force. a. Draw a complete free body diagram of the rocket with all forces acting on it, clearlyindicating which direction each forces act.  b. What is the weight of the rocket, and what is the net force on the rocket? c. If the force the engine is exerting is FE = 1.8×10^6 N, what is the magnitude of the forceof air resistance? d. What is the work done by the engine as the rocket rises 150 m?