A force of magnitude 5N acts on a 2 kg. body moving initially in the direction of the force with a speed of 4m/s. Over what distance must the force act in order to change the body's speed to 6m/s?
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- Two objects are connected by a light string passing over a light, frictionless pulley. The 5.00-kg object is released from rest at a point 4.00 m above the floor. Find the speed of the 5.00-kg object when it is 1 meter above the floor. m, = 5.00 kg h = 4.00 m m, = 3.00 kg 4.756 m/s 3.834 m/s 4.475 m/s 3.942 m/s 4.135 m/s 3.384 m/s А. D. В. Е. С. F.In a circus performance, a monkey is strapped to a sled and both are given an initial speed of 5.19 m/s up a 22.1∘∘ inclined track. The combined mass of monkey and sled is 29 kg, and the coefficient of kinetic friction between sled and incline is 0.23. How far up the incline do the monkey and sled move?A 1,596.6 kg car is skidding to a stop on a level road with a coefficient of kinetic friction = 0.6. How fast was the car going if it leaves 66 m skid marks?
- A mass of 3.77 kg is launched straight upward. At some instant later it has lost 62.8 J of kinetic energy. What is the height of the object at that time, relative to its initial elevation? Assume air resistance can be ignored.A particular spring has a rest length of 5.0 cm when it is not compressed, and a length of 4.5 cm when a mass of 10kg is placed on top of it. How long is the spring with the 10kg mass on top when it is taken into an elevator accelerating upwards at 1.0 m/s2 ?Power 14. In three situations a single force acts on a moving particle. Here are the velocities and forces: (i) i = (-41) m/s and F = (6î – 203) N; (ii) i= (21 – 3) m/s and F = (-2) + 7R) N; (iii) i = (-3î + j) m/s and F = (2î + 6j) N; Rank the situations according to the rate at which energy is being transferred, highest to lowest.
- A baseball player exerts a force of 80N on a ball for a distance of 0.7m as he throws it. If the ball has a mass of 0.15kg, what is its velocity as it leaves his hand (in m/s)? a. 25.3 b. 22.8 О с. 20.7 d. 27.3 O e. 17.9 Next pageA 675 kg car is coasting at 60.0 km/h.a) How large a force (magnitude) is required to stop the car in 6.00 seconds?b) Based on the conservation of energy, determine how many meters the car will travelduring that same short period of time.A car going 19 m/s is brought to rest in a distance of 4 m as it strikes a pile of dirt. How large a force is exerted by the seatbelts on a 90 kg passenger as the car is stopped?
- In a circus performance, a monkey is strapped to a sled and both are given an initial speed of 5.14 m/s up a 22.1∘∘ inclined track. The combined mass of monkey and sled is 29 kg, and the coefficient of kinetic friction between sled and incline is 0.23. How far up the incline do the monkey and sled move?Suppose you have a spring (of constant k = 250) and you compress it 10 cm. next to the spring you place a frictionless cart of mass 250 g. The spring is released and the cart is pushed along a horizontal track. What speed (in m/s) does the cart obtain?Sara throws a baseball to Janice. The baseball has a mass of 0.142kg. It is 1.1m above the ground, moving at 15m/s when sara lets go of it. Ignore the effects of air resistance. The baseball is moving horizontally at 13m/s when it reaches maximum height. Calculate the maximum height reached by the baseball.