1. A box with a mass of 3.0 kg is accelerated from rest by a constant force across a floor at a rate of 1.7 m/s³ for 6.5 s. (a) How much work does the force do on the box? (b) How much power is produced by the force in moving the box?

A 5 kg block is pushed 3 meters along a frictionless horizontal table by a constant 20 N (20 Newtons) force directed 60 degrees above the horizontal. The work done by the applied force is: A.)Work done by the applied force = 100 J B.)Work done by the applied force = 300 J C.)Work done by the applied force = 30 J D.)Work done by the applied force = 60 J

I need help on this question?

DIRECTION: CHOOSE THE CORRECT ANSWER F 1.A force of 5i+j+ 2k N displaced a body from a position of i+j+km to 2i +4j+ 6k m. How much work is done to displace it through this position? (A)18J (B)6J (C)12J (D)0J 2.Calculate the work done when a force of 2i+5j+ 5k N acts on a body when it produces a displacement of 2i + 4j+ 6k m. (A)54J (B)24J (C)50J (D)18J 3. A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3 N at right angles to each other. The kinetic energy of the body at the end of 10 sec is (A)100 J (B) 300 J (D) 125 J 4) Consider an 80 kg man and 320 kg horse both running along a road with the same kinetic energy. (C)50 J The man must run (A) with the same speed as the horse. (CSS) 4 times as fast as the horse. (B) twice as fast as the horse. (D) 16 times as fast as the horse. 5)particle A is travelling at a velocity of []m/s. It collides with particle B which has a velocity of Jm/s. The particle move together. The mass of particle A is 2kg and the…

3. A 60 kg boy does 60 push-ups in 40 s. With each push-up he must lift an average of 70 % of his mass a height of 40 cm off the floor. Calculate the following: a) the work the boy does for each push-up, assuming he does work only when he pushes up b) the total work done in 40 s c) the power for this period

1. A jeep with mass of 2000 kg is going 18 m/s at the bottom of a hill that is 50.0m high. When it reaches the top, it is travelling at 10m/s. (a) what is the total work done by all forces (the jeep engine, the mud, gravity, etc) as it ascends the hill? (b) What is the minimum work required by engine of the jeep if only the engine and gravity are doing work (if there is na friction, forces from mud, etc)?

1. You push a 67 kg box across a floor where the coefficient of kinetic friction is uk = 0.55. The force you exert is horizontal.(a) How much power is needed to push the box at a speed of 0.50 m/s?(b) How much work do you do if you push the box for 35s? Explain and draws.

Suppose a car approaches a hill and has an initial speed of 106 km/h at the bottom of the hill. The driver takes her foot off of the gas pedal and allows the car to coast up the hill. a.  If the car has the initial speed stated at a height of h = 0, how high, in meters, can the car coast up a hill if work done by friction is negligible?  b.  If, in actuality, a 750-kg car with an initial speed of 106 km/h is observed to coast up a hill and stops at a height 21.5 m above its starting point, how much thermal energy was generated by friction in J?  c.   What is the magnitude of the average force of friction, in newtons, if the hill has a slope 2.1° above the horizontal?

6. A force and a displacement are given in component form. What is the work done by this force? F =(si+2j+k)N Ar=(2i-3 +2%)m 24 )m

2. A force applied to a particle is given by F = 5.0x + 9.0x² where x is in meters (m) and F in Newton (N). This force moves the particle from x 1.5 m to x = 3.0 m. Find the work done by this force on the particle.