"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. At a height of 18 m, his speed is 4.5 m/s. His mass, including the propulsion unit, has the approximately constant value of 124 kg. Find the work done by the force generated by the propulsion unit.

Q: A box of mass m = 2 kg is kicked on a rough horizontal plane with an initial velocity v_O. If the…

A: Work energy theorem  It states that work done is equal to the change in kinetic energy.  W= ∆K.E

Q: 2. A boy pushes on a pig with a force F = 490 i + 230j N, giving the pig a displacement d = 1.77i+…

A: Given-   Force F=490 i+230 j NDisplacement d=1.77i+1.90j m

Q: A machine carries a 7.0 kg package from an initial position of d; = (0.7 m) i + (0.79 m)j + (0.25…

A: Given data: Initial position of the machine, di→=0.7 mi^+0.79 mj^+0.25 mk^ Final position, df→=11.5…

Q: A machine carries a 8.0 kg package from an initial position of d ; = (0.6 m) i + (0.79 m)j + (0.26…

A: Given: di=0.6m i^ + 0.79m j^ + 0.26m k^df=10.5m i^ + 15.0m j^ + 10.2m k^∆t = 15 sF = 4.0N i^ +7.0N…

Q: Consider a system of an 85.0 kg man, his 19.5-kg dog, and the earth. The gravitational potential…

A:

Q: A cart is loaded with a rock and pulled at constant speed along an inclined plane to the height of a…

A:

Q: When 150 J of work is done on a system by and external force of 15 N in 20. seconds, the total…

A: The work done on the system is 150 J by the external force force of 15 N is 20 sec.

Q: The force F(x) varies with position, as shown below. Find the work done by this force on a particle…

A:

Q: An accelerating object of mass m=2 kg is fired with an initial speed v=8 m/s at a starting point. If…

A: Given data: Mass m =2 kg Velocity v=8 m/s2. Final Kinetic energy =268 J

Q: The initial velocity of a 2-kg particle is (1 i- 3 j) m/s. After some time, the velocity becomes (4…

A:

Q: A 1000 kg car moves with a speed of 20 m/s. Suddenly the driver speeds up to 30 m/s, what is the…

A:

Q: "A toy rocket, weighing 10 N, blasts straight up from ground level with a kinetic energy of 40 J. At…

A: GivenWeight of the rocket = 10 kinetic energy of the rocket at ground level, K = 40 Jtotal…

Q: A force →F=(1.50N)ˆi+(1.10N)ˆj+(8.00N)ˆk acts on a 3.40 kg mobile object that moves from an initial…

A:

Q: An accelerating object of mass m=18 kg is fired with an initial speed v=9 m/s at a starting point.…

A:

Q: An accelerating object of mass m=7 kg is fired with an initial speed v;=8 m/s at a starting point.…

A: Given: mass of object m = 7 Kg initial speed vi = 8m/s Final kinetic energy KEf = 369 J To find:…

Q: A single force acts on a I kg panticle-like object in such a way that the position of the object as…

A:

Q: 16. A force F = (3i – 5+ 2k)N acts on a particle giving it a displacement of(3i + 4k)m. The work…

A:

Q: A body of mass 11 kg projected vertically upward from the ground has a potential energy of 320 J and…

A:

Q: A person is about to carry a 50 kg sack of rice on top of his head while walking for 20 meters…

A: Option B is correct  Work done on sack of rice is 0 joules.

Q: I am riding an elevator that has a constant upward acceleration while the elevator travels upwards a…

A:

Q: A cart of mass 8.00 kg was moved by applying two constant forces. Force 1 is 28.0 N at 42.0°, and…

A: The position of the cart is:                          The equation for the angle of the position…

Q: A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.850 m/s encounters a rough horizontal…

A:

Q: The initial velocity of a 3-kg particle is (1 i- 3 j) m/s. After some time, the velocity becomes (4…

A:

Q: A 1 kg mass is projected from the edge of a 20 m tall building with an initial speed of 10 m's. The…

A:

Q: = (7.20 N)î + (8.40 N)ĵ + (4.50 N) k acts on a 8.90 kg mobile object that moves from an initial…

A: The displacement of the object can be computed as; x→=d→f-d→ix→=2.20 mi^+3.70 mj^+4.30 mk^-7.00…

Q: A cart is loaded with a rock and pulled at constant speed along an inclined plane to the height of a…

A:

Q: A horizontal force of 5 N is required to maintain a velocity of 2 m/s for a block of 10 kg mass…

A: Given data : Force=F Mass=m time=t Velocity=V   TO FIND : Work done

Q: A 5.00-kg object has a velocity (7.00i – 2.00j) m/s. (a) What is its kinetic energy at this moment?…

A: Part aWhat is its kinetic energy at this moment? part(b) What is the net work done on the object if…

Q: Harriet is practicing archery. As she draws back an arrow, the arrow has 34.3 J of elastic potnetial…

A: Write a given values of this question. Elastic potential energy. PEelastic=34.3J Gravitational…

Q: An object of mass 4.34 kg starts at the top of a hill of height 2 m. When it rolls down to the…

A: The solution is given below

Q: A proton (mass m = 1.67 × 10-27 kg) is being accelerated along a straight line at 2.70 × 1011 m/s2…

A: (a)consider the kinematic equation.Vf2=v02 +2as                (i)             where,     vf=final…

Q: An apple falls from a tree and drops straight to the ground. Its initial height was 2.3 m , and its…

A:

Q: The only force acting on a 2.0 kg canister that is moving in an xy plane has a magnitude of 5.0…

A: According to the work-energy theorem, the change in the kinetic energy of the canister equals to…

Q: A sledgehammer of mass m = 1.9 kg falls freely vertically downward from a height of h = 2.5 m at an…

A: Mass= 1.9 kg Height= 2.5 m

Q: F = 5000 N 0= 36.9° fk = 3 500 N d =20m Weight = 14 700 N

A:

Q: A roller coaster of mass 800 kg is moving with a speed of 20.0 m/s at position A. At position C, the…

A: Given: The mass of the roller coaster is 800 kg. The final velocity of the roller coaster is 27 m/s.…

Q: A sledgehammer of mass m = 1.1 kg falls freely vertically downward from a height of h = 2.5 m at an…

A: mass of sledgehammer (m) = 1.1 kg h = 2.5 m Initial speed (v) = 11.5 m/s distance moved by piling…

Q: F, (N) F, (N) y; F; (N) 5.0 15 20 10 2.0아 y (m) 1.0 5.0- -10 x (m) 40 z (m) -20 20 10 20 30 10 15…

A:

Q: A force É = (4.40 N) î + (3.00 N)ĵ+ (1.80 N) k acts on a 5.40 kg mobile object that moves from an…

A: Using the force and work done relation to solve the problem

Q: The only force acting on a 1.3 kg canister that is moving in an xy plane has a magnitude of 2.9 N.…

A: The net work done to change the direction of the motion is zero.

Q: A force É = (1.90 N )î + (1.00 N )ŷ + (4.30 N )k acts on a 5.70 kg mobile object that moves from an…

A: (a) Let W be defined as the work done. Therefore, W=F→.ds→=F→.d→f-d→i

Q: An accelerating object of mass m=14 kg is fired with an initial speed v-2 m/s at a starting point.…

A:

Q: Consider again pulling a 60 m rope up a cliff face, where the rope has a mass of 66 g/m. At what…

A:

Q: iđ¢ = (2.80 m)î + (8.50 m)j +(4.40 m) k in 1.70 s. A force F = (7.1ON)Î + (4.00 N)} +(5.00 N)k acts…

A: Given: di = 3.70 i^+8.1 j^+2.0 k^df=2.80 i^+8.5 j^ +4.4 k^

Q: An accelerating object of mass m=4 kg is fired with an initial speed v=3 m/s at a starting point. If…

A: Initial velocity, u =3 m/s Mass, m = 4 kg Final Kinetic energy, K.E.2=380 J