65 kg , 1.74 m tall Yelena holds the women's pole-vaulting record of 5.06m Estimate the...
65 kg , 1.74 m tall Yelena holds the women's pole-vaulting record of 5.06m Estimate the amount of internal energy that she converts into mechanical energy during the vault if before takeoff she is running at a speed of 8.2 m/s. Assume internal energy of pole is neglible.
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65 kg , 1.74 m tall Yelena holds the women's pole-vaulting
record of 5.06m Estimate the...
The specialty of an athlete on the women's track team is the pole vault. She has...
The specialty of an athlete on the women's track team is the pole vault. She has a mass of 46 kg and her approach speed is 8.6 m/s. When she is directly above the bar, her speed is 1.3m/s. Neglecting air resistance and any energy absorbed by the pole, determine the amount she has raised herself as she crosses the bar.
The specialty of an athlete on the women's track team is the pole vault. She has...
The specialty of an athlete on the women's track team is the pole vault. She has a mass of 44 kg and her approach speed is 8.7 m/s. When she is directly above the bar, her speed is 1.7 m/s. Neglecting air resistance and any energy absorbed by the pole, determine the amount she has raised herself as she crosses the bar. m A roller coaster car is pulled up the first (biggest) hill, 103 meters above the subsequent bottom...
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....
QUESTION 1 In pole vaulting, a jumper achieves great height by converting their kinetic energy of running in to gravita...
QUESTION 1
In pole vaulting, a jumper achieves great height by converting
their kinetic energy of running in to gravitational potential
energy. The pole plays an intermediary role in this process.
Suppose that a jumper runs at a speed of 9.1 m s-1, use a simple
model to estimate how far the jumper's centre of mass will rise.
(For reference only, a new world record was set in early 2014 of
6.16 m.)
QUESTION 2
A hoist system (see figure...
An airplane accelerates uniformly from rest. A physicist passenger holds up a thin string of negligible...
An airplane accelerates uniformly from rest. A physicist passenger holds up a thin string of negligible mass to which she has tied her ring, which has a mass m. She notices that as the plane accelerates down the runway, the string makes an angle 0 with the vertical as shown above. 56. In the space below, draw a free-body diagram of the ring, showing and labeling all the forces present. (a) The plane reaches a takeoff speed of 65 m/s...
A 44-kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she...
A 44-kg pole vaulter running at 10 m/s vaults over the bar. Her speed when she is above the bar is 1.4 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar. m
A 69-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she...
A 69-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.5 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar. _____m
a.) A 49-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when...
a.) A 49-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.1 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar. b.) A skier of mass 60 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 80 m up a 30° slope (assumed frictionless) at a...
A 190-kg rugby player running east with a speed of 4.00 m/s tackles a 99.0-kg opponent...
A 190-kg rugby player running east with a speed of 4.00 m/s
tackles a 99.0-kg opponent running north with a speed of 3.90 m/s.
Assume the tackle is a perfectly inelastic collision. (Assume that
the +x axis points towards the east and the +y
axis points towards the north.)
(a) What is the velocity of the players immediately after the
tackle?
magnitude
m/s
direction
° counterclockwise from the +x axis
(b) What is the amount of mechanical energy lost during...
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 1
In pole vaulting, a jumper achieves great height by converting
their kinetic energy of running in to gravitational potential
energy. The pole plays an intermediary role in this process.
Suppose that a jumper runs at a speed of 9.1 m s-1, use a simple
model to estimate how far the jumper's centre of mass will rise.
(For reference only, a new world record was set in early 2014 of
6.16 m.)
QUESTION 2
A hoist system (see figure...
An airplane accelerates uniformly from rest. A physicist passenger holds up a thin string of negligible mass to which she has tied her ring, which has a mass m. She notices that as the plane accelerates down the runway, the string makes an angle 0 with the vertical as shown above. 56. In the space below, draw a free-body diagram of the ring, showing and labeling all the forces present. (a) The plane reaches a takeoff speed of 65 m/s...
A 190-kg rugby player running east with a speed of 4.00 m/s
tackles a 99.0-kg opponent running north with a speed of 3.90 m/s.
Assume the tackle is a perfectly inelastic collision. (Assume that
the +x axis points towards the east and the +y
axis points towards the north.)
(a) What is the velocity of the players immediately after the
tackle?
magnitude
m/s
direction
° counterclockwise from the +x axis
(b) What is the amount of mechanical energy lost during...
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