Consider the 65.0 kg ice skater being pushed by two others shown in the figure. Frot F, F, Free-body diagram F2 F, (a) Find the direction (in degrees) and magnitude (in N) of Frot, the total force exerted on her by the others, given that the magnitudes F, and F2 are 22.0 N and 15.0 N, respectively. ° (counterclockwise from the direction of F, is positive) direction magnitude N (b) What is her initial acceleration (in m/s2) if she is initially stationary and wearing steel-bladed skates that point in the direction of Frot? (c) What is her acceleration (in m/s2) assuming she is already moving in the direction of F,tot? Remember that friction is always in the opposite direction of motion or attempted motion between surfaces in contact. m/s? (in the direction of Frot)

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Chapter6: Applications Of Newton's Laws
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Problem 58P: Calculate the maximum acceleration of a car that is heading up a 4.00slope (one that makes an angle...
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3.
Consider the 65.0 kg ice skater being pushed by two others shown in the
figure.
Frot
F2
F,
Free-body diagram
F,
F,
(a) Find the direction (in degrees) and magnitude (in N) of Frot, the total
force exerted on her by the others, given that the magnitudes F, and F2
are 22.0 N and 15.0 N, respectively.
° (counterclockwise from the direction of F, is positive)
direction
magnitude
N
(b) What is her initial acceleration (in m/s2) if she is initially stationary and
wearing steel-bladed skates that point in the direction of Frot?
(e) What is her acceleration (in m/s2) assuming she is already moving in the
direction of Frot? Remember that friction is always in the opposite
direction of motion or attempted motion between surfaces in contact.
m/s2 (in the direction of Frot)
Additional Materials
O Reading
4.
Calculate the maximum deceleration (in m/s2) of a car that is heading down
a 10° slope (one that makes an angle of 10° with the horizontal) under the
following road conditions. You may assume that the weight of the car is
evenly distributed on all four tires and that the static coefficient of friction is
involved-that is, the tires are not allowed to slip during the deceleration.
(a) on dry concrete
m/s2
(b)
on wet concrete
m/s?
(c) on ice, assuming that
"s
= 0.100, the same as for shoes on ice
m/s2
Transcribed Image Text:3. Consider the 65.0 kg ice skater being pushed by two others shown in the figure. Frot F2 F, Free-body diagram F, F, (a) Find the direction (in degrees) and magnitude (in N) of Frot, the total force exerted on her by the others, given that the magnitudes F, and F2 are 22.0 N and 15.0 N, respectively. ° (counterclockwise from the direction of F, is positive) direction magnitude N (b) What is her initial acceleration (in m/s2) if she is initially stationary and wearing steel-bladed skates that point in the direction of Frot? (e) What is her acceleration (in m/s2) assuming she is already moving in the direction of Frot? Remember that friction is always in the opposite direction of motion or attempted motion between surfaces in contact. m/s2 (in the direction of Frot) Additional Materials O Reading 4. Calculate the maximum deceleration (in m/s2) of a car that is heading down a 10° slope (one that makes an angle of 10° with the horizontal) under the following road conditions. You may assume that the weight of the car is evenly distributed on all four tires and that the static coefficient of friction is involved-that is, the tires are not allowed to slip during the deceleration. (a) on dry concrete m/s2 (b) on wet concrete m/s? (c) on ice, assuming that "s = 0.100, the same as for shoes on ice m/s2
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