And the following problem: A mass m 12 kg, has an initial velocity (a) Calculate the...
A mass of 20 kg has an initial velocity of 3 m/s and a final velocity of 5 m/s. a) What was the change in kinetic energy in this system? b) How much Work was done? c) Assume that the mass is being influenced by a constant force. The mass travels a distance of 40 meters. What is the value of the force influencing it? d) What is the acceleration of the mass?
3 A block of mass 15 kg is initially moving with velocity 20 m/s. If a net 800 J of work is done by the force, calculate the final velocity attained by the block. [Work- Energy theorem)
bicycle of mass m with initial velocity 10 m/s coasts to a net height of 3.5 m. 1. What is the velocity at the top, neglecting friction? 2. Write the equation of conservation of total energy if friction is not neglected 3. Find the final speed at the top if the mass of bicycle = 60 Kg and the work done by friction force in absolute value is 600 J.
A rock with a mass of 3.80 kg is moving with velocity (6.609 - 1.409) m/s. (HINT: v2 = v.v.) (a) What is the rock's kinetic energy (in )) at this velocity? 86.48 (b) Find the net work (in )) on the rock if its velocity changes to (8.00î + 4.00)) m/s. 25.41 x Find the square of the velocity using the hint given, and then use the definition of kinetic energy to calculate the new kinetic energy. The change...
est 1 Version A Page 5 of 12 6. An object of mass 0.115 kg moves along a straight line initially from est with an applied force. The final velocity measured after sometime is 25m/s. Calculate the followings a. the initial kinetic energy of the object b. the final kinetic energy of the object c. the work done ( use work -kinetic energy theorem principle)
A stone with a mass of 3.20 kg is moving with velocity (6.20 - 2.209) m/s. (HINT: v2 - v.v.) (a) What is the stone's kinetic energy (in )) at this velocity? (b) Find the net work (in J) on the stone if its velocity changes to (8.00 +4.00) m/s.
A 2.0-kg particle has an initial velocity of (Si-4) m/s, Sometime later, its velocity is 7i +3j assuming no energy is lost in the process? m/s. How much work was done by the resultant force during this time interval, b. 49 J c. 19 d. 53 J e 27
A 1-kg ball in the air has an initial velocity vo = [ -20 ] i + [ -20 ] j m/s. It falls for a total time of 1 s. Assume that positive x-values are to the right and positive y-values are upward. What is the initial momentum pi of the ball? -20 i + -20 j kg*m/s What is the impulse or change in momentum ∆p of the ball? 0 i + -10 j kg*m/s What is the final momentum pf of the ball?...
A 2.80-kg object has a velocity (6.20 î - 2.40 ĵ) m/s. (Note: From the definition of the dot product, v2 = v with arrow · v with arrow.) (a) What is its kinetic energy at this moment? (b) Find the net work done on the object if its velocity changes to (8.00 î+ 4.00 ĵ) m/s. J
The sphere A of mass m, = 1 kg moves with an initial velocity of v2 = 5 m/s → as shown and strikes the stationary sphere B. The coefficient of restitution is e=0.8. Calculate (a) the mas my, if the velocity of B after impact is v' = 5 m/s ; (b) the percentage loss of energy due to the impact. - -