What is the kinetic energy of a 30 kg dog that is running at a speed of 7.8 m/s (about 17 mi/h)?
What is the kinetic energy of a 30 kg dog that is running at a speed...
A 5-kg cat and a 10-kg dog are running with the same kinetic energy. If the speed of the cat is 8 m/s, the speed of the dog is a) 4 m/s b) 2.82 m/s c) 5.65 m/s d) 16 m/s
P4.4 Calculate {a} the kinetic energy of an 85.0-kg athlete running at a speed of 10.0 m/s and (b) the kinetic energy of a 60.0-kg cheetah running at 31.0 m/s. (c) Compare the kinetic energy of the cheetah to the kinetic energy of the athlete.
Problem 1 A dog starts running at a constant speed v0= 6 m/s. Initially, the dog is at a distance d= 10 m from a window. The window is located at a height h= 20 m above the ground. On top of the window there is a plant pot of mass m = 3 kg. The pot falls from the window 2 seconds after the dog starts running. a) What is the speed (inm/s2) of the pot when it reaches...
A running 61-kg cheetah has a top speed of 28 m/s. (a) What is the cheetah's maximum kinetic energy? J (b) Find the cheetah's speed when its kinetic energy is one half of the value found in part (a). m/s
011 10.0 points What is the speed of a 0.146 kg baseball if its kinetic energy is 110J? Answer in units of m/s. 012 10.0 points Consider a compact car that is being driven at 88 km/h. The acceleration of gravity is 9.8 m/s From what height would the car have to be dropped to have the same kinetic energy? Answer in units of m.
By what factor will the kinetic energy change if the speed of the baseball is decreased to 67.2 mi/h?
A dog (19 kgkg ) is running with a speed of 4.1 m/sm/s . What is the force required to stop the dog? Assume that the force is horizontal, constant, and is applied over a distance of 0.55 mm .
A 0.49-kg particle has a speed of 3.0 m/s at point A and kinetic energy of 7.7 J at point B. (a) What is its kinetic energy at A? J (b) What is its speed at point B? m/s (c) What is the total work done on the particle as it moves from A to B? J
A 0.500-kg particle has a speed of 1.50 m/s at point and kinetic energy of 7.70 J at point B (a) What is its kinetic energy at (b) What is its speed at m/s (c) What is the net work done on the particle by external forces as it moves from to
(non calculus physics) A college fullback weighing 100 kg is running north at a speed of 4.5 m/s when he is tackled by a 110 kg linebacker running east at 3.5 m/s. Assume the collision is perfectly inelastic. Find the velocity of the players just after the tackle. Find the kinetic energy lost as a result of the collision. How do you account for this apparently “lost” energy?