A construction worker gives a brick a push so that it slides up on a wood ramp. The brick stops short of the top of the ramp and slides back down. The worker is puzzled that it took a longer time for the brick to slide down than the time for sliding up. Can you help the worked understand this difference in the sliding times?
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A construction worker gives a brick a push so that it slides up on a wood ramp. The brick stops short of the top of the ramp and slides back down. The worker is puzzled that it took a longer time for the brick to slide down than the time for sliding up. Can you help the worked understand this difference in the sliding times?
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- öaalg äbäi A horizontal force of 1.5 N acts on a 0.2kg mass to accelerate it along a horizontal path. How fast is the mass going after acceleration from rest through 0.3 m? Neglect the *.friction 2.1 m/sec 3.66 m/sec 2.54 m/secA cat kicks a 0.43 kg chees block that was initially at rest. the net force is 20. What is the cheeses speed at t= 20 msThe attatched graph is a force over distance graph for a pop-up spring toy. Use the graph to answer the following questions. a. Determine the maximum height the pop-up toy would reach (if it landed perfectly vertical). b. If the spring were to launch the toy horizontally across a felt rug, with a coefficient of kinetic friction μ = 0.35, what would be the velocity of the toy after travelling 0.5 meters beyond its launch point?
- A car of mass 1670kg initially at a speed of 80 km/m crushes into a wall, if the accident lasted for 0.2 sec. what is the amount of force exerted in the car during the crashAnswer correlty in terms of kg ..........>>>An 1800 kg car starts from rest and accelerates to 25.0 m/s in 16.0 s. The force of air resistance on the car is constant and equal to 450 N. Find: A. the car's acceleration B. the force exerted by the engine C. the work done by the engine
- An Atwood’s machine is set up by suspending two blocks connected by a string of negligible mass over a pulley, as shown above. The blocks are initially held at rest and then released at time t0=0 s. The speed of the 3 kg block at time t1=2.0 s is most nearly: A) 2.0 m/s B) 4.0 m/s C) 7.0 m/s D) 10.0 m/sMultiple-object systems without friction: The figure shows a 100-kg block being released from rest from a height of 1.0 m. It then takes it 0.90's to reach the floor. What is the mass m of the other block? The pulley has no appreciable mass or friction. (60 kg) m ------- 100 kg 1.0 mPlease answer it within 30 minutes.I will upvote! Problem: With ball initial velocity of 40m/sCoefficient of kinetic friction between ball and ground is 0.110.How fast is the ball still traveling when it reaches net distance of 18m away?Assume the ball is still in motion on the ground the entire time.
- Climbing ropes stretch when they catch a falling climber, thus increasing the time it takes the climber to come to rest and reducing the force on the climber. In one standardized test of ropes, an 80 kg mass falls 4.8 m before being caught by a 2.5-m-long rope. If the net force on the mass must be kept below 11 kN, what is the minimum time for the mass to come to rest at the end of the fall?pervious question: Same type of track as in the previous problem, this time with d = 4.73 m. The block starts at x = 0, and is given a push to the left with an initial speed of 7.57 m/s, so it starts sliding up the track to the left. At what value of x will the block reverse direction and start sliding back down? New question: OK, same sort of track, but now with d = 2.12 m. Now suppose the blocks starts on the track at x = 4.10 m. The block is given a push to the left and begins to slide up the track, eventually reaching its maximum height at x = 0, at which point it turns around and begins sliding down. What was its initial speed in this case? 18.98 m/s 12.47 m/s 8.82 m/s 14.90 m/sA student releases a 3.9kg cart from the top of ramp and starts a stopwatch. The length from the front of the cart to the end of the ramp and the distance from the end of the ramp to the stopper are shown. Neglect backwards friction and drag and assume the cart does not lose speed transitioning from the ramp to the floor. What is the cart's acceleration on the ramp? unit | (magnitude) What is the cart's acceleration on the floor? 130cm unit (magnitude) How long does the cart take to reach the end of the ramp? 5° 200cm unit (timed from the release) How fast is the cart traveling as it hits the stopper? unit How long does the cart take to reach the stopper? unit (timed from the release) cannot be detern check answers challenge ne Calculator ound = 343m/s cant figures Rain to stop e here to search ACC t;320