After a 70 kg high jumper goes over 2-meter bar, his body collides with the mat...
After a 70 kg high jumper goes over 2-meter bar, his body collides with the mat in a 0.01 seconds. How much force is exerted by the high jumper?
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After a 70 kg high jumper goes over 2-meter bar, his body
collides with the mat...
These are biomechanics questions. They are not related to each other. A 70 kg high jumper...
These are biomechanics questions. They are not related to each
other.
A 70 kg high jumper is attempting to clear a bar at a height of 2 meters. The coefficient of friction between his foot and the ground is 0.35. The resultant force of all of the forces just prior o take off when his foot is stillin contact with the ground is equal to 400 Newtons straight up What is the magnitude and direction of all of the forces...
A 54 kg pole vaulter intends to pass over a 6.4-meter high bar. She needs to...
A 54 kg pole vaulter intends to pass over a 6.4-meter high bar. She needs to maintain a minimal speed of 0.72 m/s at the top in order to pass the bar. What is the minimum speed at which she should run in order to attain the height? Neglect air resistance, as well as any energy absorbed by the pole Answer in units of m/s and round to one decimal place. Hints: Mechanical energy is conserved during vaulting. KE at...
QUESTION 3 A 54 kg pole vaulter intends to pass over a 6.9-meter high bar. She...
QUESTION 3 A 54 kg pole vaulter intends to pass over a 6.9-meter high bar. She needs to maintain a minimal speed of 0.79 m/s at the top in order to pass the bar. What is the minimum speed at which she should run in order to attain the height? Neglect air resistance, as well as any energy absorbed by the pole. Answer in units of m/s and round to one decimal place. Hints: Mechanical energy is conserved during vaulting....
questions with answers the cylinder's vertical velocity is zero? 10. A gymnast falls from the high...
questions with answers
the cylinder's vertical velocity is zero? 10. A gymnast falls from the high bar and lands on a 10 cm thick gymnastics mat. The gymnast strikes the back of his head against the mat during his landing. His head is moving at 7 m/s when it first strikes the mat. The mass of his head is 5 kg. The impact ends when the gymnast's head comes to a stop after deflecting the mat 6.5 cm. How much...
A 70 Kg skier is standing still on to of 30m high slope. After taking a...
A 70 Kg skier is standing still on to of 30m high slope. After taking a deep breath, he starts skiing downhill towards the tip of the ramp where he takes off into the sky. As he reaches a 20m high point along his flight trajectory his speed (magnitude of his velocity) is 10 m/s. - How much mechanical energy has been dissipated up to this point? - What has this dissipated mechanical energy transformed into? - Do you have...
Sarah is holding a 20 kg dumbbell over a 30-meter high cliff (32 meters from her...
Sarah is holding a 20 kg dumbbell over a 30-meter high cliff (32 meters from her hands to the ground). Just as she releases the dumbbell, it has a potential energy of 6272 J and kinetic energy of 0 J. However, just as the dumbbell hits the ground, how much potential and kinetic energy does it have?
Jake weighs 70 kg and has a core body temperature of 37 ° C when he...
Jake weighs 70 kg and has a core body temperature of 37 ° C when he begins steady state exercise at a VO2 of 2.5 L O2/min (12.5 kcal/min). His gross mechanical efficiency is 15%, and his sweat rate is 10 mL/min. Assume that all sweat produced evaporates and that 10% of heat produced is lost through radiative, conductive, and convective heat losses combined. After 45 minutes of exercising at this VO2, how much will his body temperature increase? (5...
physics questions help. A 6 kg mass is swung in a horizontal circle at the end...
physics questions help.
A 6 kg mass is swung in a horizontal circle at the end of an 80 cm long string. The mass starts from rest and accelerates at a constant rate, going through 5 revolutions in 3 seconds. What is the tension in the string? A roller coaster car is to go down a hill and then around a loop-the-loop with a 7 m radius. How high does the hill need to be for the car to lost...
8. An empty beer mug of mass 0.80 kg is sliding on a bar counter, after...
8. An empty beer mug of mass 0.80 kg is sliding on a bar counter, after being thrown by a drunken man with an initial speed of 2.5 m/s. The force of friction between the mug and the counter has a magnitude of 1.2 N. The bartender is distracted and unable to catch the mug. Fortunately without interacting with anything but the counter, the mug stops before reaching the end of the counter. (This problem is a good review of...
6,7,8,9 e) A diver off the high board imparts an initial rotation with his body fully...
6,7,8,9
e) A diver off the high board imparts an initial rotation with his body fully extended before going into a tuck and executing three back somersaults before hitting the water. If his moment of Inertia before the fuck is 18.2 kg- and after the tuck during the somersaults is 3.8 kg.m2, what rotation rate must he impart to his body directly off the board and before the tuck if he takes 1.4s to execute the somersaults before hitting the...
These are biomechanics questions. They are not related to each
other.
A 70 kg high jumper is attempting to clear a bar at a height of 2 meters. The coefficient of friction between his foot and the ground is 0.35. The resultant force of all of the forces just prior o take off when his foot is stillin contact with the ground is equal to 400 Newtons straight up What is the magnitude and direction of all of the forces...
A 54 kg pole vaulter intends to pass over a 6.4-meter high bar. She needs to maintain a minimal speed of 0.72 m/s at the top in order to pass the bar. What is the minimum speed at which she should run in order to attain the height? Neglect air resistance, as well as any energy absorbed by the pole Answer in units of m/s and round to one decimal place. Hints: Mechanical energy is conserved during vaulting. KE at...
questions with answers
the cylinder's vertical velocity is zero? 10. A gymnast falls from the high bar and lands on a 10 cm thick gymnastics mat. The gymnast strikes the back of his head against the mat during his landing. His head is moving at 7 m/s when it first strikes the mat. The mass of his head is 5 kg. The impact ends when the gymnast's head comes to a stop after deflecting the mat 6.5 cm. How much...
physics questions help.
A 6 kg mass is swung in a horizontal circle at the end of an 80 cm long string. The mass starts from rest and accelerates at a constant rate, going through 5 revolutions in 3 seconds. What is the tension in the string? A roller coaster car is to go down a hill and then around a loop-the-loop with a 7 m radius. How high does the hill need to be for the car to lost...
8. An empty beer mug of mass 0.80 kg is sliding on a bar counter, after being thrown by a drunken man with an initial speed of 2.5 m/s. The force of friction between the mug and the counter has a magnitude of 1.2 N. The bartender is distracted and unable to catch the mug. Fortunately without interacting with anything but the counter, the mug stops before reaching the end of the counter. (This problem is a good review of...
6,7,8,9
e) A diver off the high board imparts an initial rotation with his body fully extended before going into a tuck and executing three back somersaults before hitting the water. If his moment of Inertia before the fuck is 18.2 kg- and after the tuck during the somersaults is 3.8 kg.m2, what rotation rate must he impart to his body directly off the board and before the tuck if he takes 1.4s to execute the somersaults before hitting the...
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