Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 7, Problem 102P
(a)
To determine
The speed of the boat when it leaves the ramp.
(b)
To determine
Speed of the boat when it strikes the water again.
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An Athlete pulls a 20 kilograms crate along Lane A of the storage house. Lane A is a 15m aisle. Using the yellow rope, he exerted an 80N force 15 degrees above the horizontal.
suppose the athelete met his coach at the end of the aisle and he added 5kg item on the crate and instructed him to bring the item to next aisle (Lane B) which was also 15m long. Starting from rest, beginning in Lane B, the athelet pulls the crate with 95N force 15 degrees above horizontal using the rope. The athelete reaches the end of the row of Lane B at 2.5 meters per second.
Question:
How much work is done by the Athelete? What is his change in the kinetic energy of the crate at the end of Lane B? Lastly, how large is the average friction force that had acted on the crate?
Please show solution or formula used. Thank you!
A diver of mass m drops from a board 10.0 m above the water surface, asshown in the figure below. Find his speed 5.00 m above the water surface.Neglect air resistance.
Chapter 7 Solutions
Physics for Scientists and Engineers
Ch. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10P
Ch. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - Prob. 14PCh. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19PCh. 7 - Prob. 20PCh. 7 - Prob. 21PCh. 7 - Prob. 22PCh. 7 - Prob. 23PCh. 7 - Prob. 24PCh. 7 - Prob. 25PCh. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - Prob. 28PCh. 7 - Prob. 29PCh. 7 - Prob. 30PCh. 7 - Prob. 31PCh. 7 - Prob. 32PCh. 7 - Prob. 33PCh. 7 - Prob. 34PCh. 7 - Prob. 35PCh. 7 - Prob. 36PCh. 7 - Prob. 37PCh. 7 - Prob. 38PCh. 7 - Prob. 39PCh. 7 - Prob. 40PCh. 7 - Prob. 41PCh. 7 - Prob. 42PCh. 7 - Prob. 43PCh. 7 - Prob. 44PCh. 7 - Prob. 45PCh. 7 - Prob. 46PCh. 7 - Prob. 47PCh. 7 - Prob. 48PCh. 7 - Prob. 49PCh. 7 - Prob. 50PCh. 7 - Prob. 51PCh. 7 - Prob. 52PCh. 7 - Prob. 53PCh. 7 - Prob. 54PCh. 7 - Prob. 55PCh. 7 - Prob. 56PCh. 7 - Prob. 57PCh. 7 - Prob. 58PCh. 7 - Prob. 59PCh. 7 - Prob. 60PCh. 7 - Prob. 61PCh. 7 - Prob. 62PCh. 7 - Prob. 63PCh. 7 - Prob. 64PCh. 7 - Prob. 65PCh. 7 - Prob. 66PCh. 7 - Prob. 67PCh. 7 - Prob. 68PCh. 7 - Prob. 69PCh. 7 - Prob. 70PCh. 7 - Prob. 71PCh. 7 - Prob. 72PCh. 7 - Prob. 73PCh. 7 - Prob. 74PCh. 7 - Prob. 75PCh. 7 - Prob. 76PCh. 7 - Prob. 77PCh. 7 - Prob. 78PCh. 7 - Prob. 79PCh. 7 - Prob. 80PCh. 7 - Prob. 81PCh. 7 - Prob. 82PCh. 7 - Prob. 83PCh. 7 - Prob. 84PCh. 7 - Prob. 85PCh. 7 - Prob. 86PCh. 7 - Prob. 87PCh. 7 - Prob. 88PCh. 7 - Prob. 89PCh. 7 - Prob. 90PCh. 7 - Prob. 91PCh. 7 - Prob. 92PCh. 7 - Prob. 93PCh. 7 - Prob. 94PCh. 7 - Prob. 95PCh. 7 - Prob. 96PCh. 7 - Prob. 97PCh. 7 - Prob. 98PCh. 7 - Prob. 99PCh. 7 - Prob. 100PCh. 7 - Prob. 101PCh. 7 - Prob. 102PCh. 7 - Prob. 103PCh. 7 - Prob. 104PCh. 7 - Prob. 105PCh. 7 - Prob. 106P
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- An Athlete pulls a 20 kilograms crate along Lane A of the storage house. Lane A is a 15m aisle. Using the yellow rope, he exerted an 80N force 15 degrees above the horizontal. suppose the athelete met his coach at the end of the aisle and he added 5kg item on the crate and instructed him to bring the item to next aisle (Lane B) which was also 15m long. Starting from rest, beginning in Lane B, the athelet pulls the crate with 95N force 15 degrees above horizontal using the rope. The athelete reaches the end of the row of Lane B at 2.5 meters per second. Question: How much work is done by the Athelete? how large is the average friction force that had acted on the crate? Please show solution or formula used. Thank you!arrow_forwardA skier is on a 25 degree slope and his mass is 80kg. If his constant velocity and the coefficient of kinetic friction between the ski and the snow is 9 m/s and 0.80, respectively, compute his velocity when he has skid 20m from his initial position and a drag force experienced by the skier equivalent to a magnitude of 0.6V^2.arrow_forwardA skier weighing 90 kg starts from rest down a hill inclined at 17. He skis 100 m down the hill and then coasts for 70 m along level snow until he stops. Find the coef ficient of kinetic friction between the skis and the snow. What velocity does the skien have at the bottom of the hill?arrow_forward
- A small boat is being pushed up a ramp into the back of a flatbed truck. The boat is sitting at the top of the ramp, which is located 1.4 m above the ground. The boaters think the boat is safe there, and begin to walkaway. However, they have neglected the thin layer of ice that has formed on the ramp, which is angled at 30◦ up from the ground. Neglecting the friction between the boat and the ramp, how long do the boaters havebefore the boat reaches the bottom of the ramp?arrow_forwardA boat is being towed at the rate of 12 mi/hr. At the instant (t=0) that thetowing line is cast off, a man in the boat begins to row in the direction ofmotion, exerting a force of 20lb. If the combined weight oftheman and theboat is 480 lb and the resistance in lbs is equal to 1.75v, where v ismeasured in ft/s, find the speed of the boat after ½ min.arrow_forwardA skier starts from rest at the top of a hill that is inclined 10.5°with respect to the horizontal. The hillside is 2.00 x 102 m long,and the coefficient of friction between snow and skis is 0.075 0.At the bottom of the hill, the snow is level and the coefficientof friction is unchanged. How far does the skier glide along thehorizontal portion of the snow before coming to rest?arrow_forward
- A 4.45 x 104N truck is travelling at 100 km/h. If the coefficient of friction between the tires and the roadway is 0.50, whatis the minimum distance the truck will go before stopping?arrow_forward(B) A maintenance man (climber) tries to maintain one of the power stations iocated at the top of the mountain in the situation of winter. During his work and by mistake drops his water bottle which then slides 100 M down the side of a steep icy slope to a point which is 10 m lower than the climber's position. The mass of the climber is 60 kg and his water bottle has a mass of 500 g. 1) If the bottle starts from rest, how fast is it travelling by the time it reaches the bottom of the slope? (Neglect friction.) What is the total change in the climber's potential energy as she climbs down the mountain to fetch her fallen water bottle? i.e. what is the difference between her potential energy at the top of the slope and the bottom of the slope? Analysis all the above situation.arrow_forwardA block of ma65 m- 2.00 kg is released from rest ot h= 0.500m above the surface of a table, at the top of a e= 30.0°incline as shown below. The coefficient of kinetic friction between the block and the incline is 0,150. The incline is fixed on a table of height H= 2.00 m. (A.) What is the velocity of the block as it leaves the incline? Use the conservation of energy. (B.) How far from the toble will the block hit the floor? m h Н -Rarrow_forward
- A student is skateboarding down a ramp that is 6.02 m long and inclined at 22.3° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 4.98 m/s. Neglect friction and find the speed at the bottom of the ramp.arrow_forwardTwo snowy peaks are at heights H 850 m and h 750 m above the valley between them. A ski run extends between the peaks, with a total length of 3.2 km and an average slope of 30 ). (a) A skier starts from rest at the top of the higher peak. At what speed will he arrive at the top of the lower peak if he coasts without using ski poles? Ignore friction. (b) Approximately what coefficient of kinetic friction between snow and skis would make him stop just at the top of the lower peak?arrow_forwardYou want to run up a hill starting from standstill. The hill is at an angle of 30 degrees with respect to hortizontal and has a coefficient of static friction of 0.3. How long will it take to reach a top speed of 25.2km/h?arrow_forward
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