John and Mary are skating at an ice rink. John skates at a constant speed of...
John and Mary are skating at an ice rink. John skates at a constant speed of 7.3 m/s, with respect to the ice surface, directly south. Mary skates at a constant speed of 12.1 m/s in a direction of 32° west of south, with respect to the ice. What are the magnitude and direction of Mary's velocity with respect to John? Give the magnitude in m/s, and give the direction as measured relative to due south.
Homework Answers
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John and Mary are skating at an ice rink. John skates at a
constant speed of...
John and Mary are skating at an ice rink. John skates at a constant speed of...
John and Mary are skating at an ice rink. John skates at a constant speed of 6.6 m/s, with respect to the ice surface, directly south. Mary skates at a constant speed of 12.3 m/s in a direction of 33° west of south, with respect to the ice. What are the magnitude and direction of Mary's velocity with respect to John? Give the direction as measured relative to due south. What is magnitude What is direction
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A 55kg ice skater is at rest on a flat skating rink. A 198N horizontal force is needed to set...
A 55kg ice skater is at rest on a flat skating rink. A 198N horizontal force is needed to set the skater in motion. However, after the skater is in motion, ahorizontal force of 175N keeps the skater moving at a constant velocity. Find the coefficients of static and kinetic friction between the skates and the ice.
A family is skating. The father (85 kg) skates at 8.6 m/s and collides and sticks to the mother (65 kg), who...
A family is skating. The father (85 kg) skates at 8.6 m/s and collides and sticks to the mother (65 kg), who was initially moving at 3.0 m/s and at 45° with respect to the father's velocity. The pair then collides with their daughter (30 kg), who was stationary, and the three slide off together. What is their final velocity? (Enter the magnitude in m/s and the direction in degrees with respect to the father's initial velocity.) magnitude = ?? m/s direction = ?? ° with respect to the father's initial velocity
Two friends, Al and Jo, have a combined mass of 168 kg. At an ice skating...
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Two friends, Al and Jo, have a combined mass of 170 kg. At the ice skating...
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3 Roller skating Your'e on a roller-skating rink with a friend who weighs twice as much...
3 Roller skating Your'e on a roller-skating rink with a friend who weighs twice as much as you. The two of you stand motionless in the middle of the rink so that your combined momentum is zero. You then push one another and begin to roll apart. (a) (5 points) If your momentum is then 450 N-s to the left, what is your friend's mo- mentum (include magnitude and direction)? (b) (10 points) If the push lasted for 2s, what...
A 54-kg ice skater pushes off the wall of the rink, giving herself an initial speed...
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A 54-kg ice skater pushes off the wall of the rink, giving herself an initial speed...
A 54-kg ice skater pushes off the wall of the rink, giving herself an initial speed of 3.5 m/s. She then coasts with no further effort. The frictional coefficient between skates and ice is 0.025. How far does she go? Express your answer with the appropriate units.
3 Roller skating Your'e on a roller-skating rink with a friend who weighs twice as much as you. The two of you stand motionless in the middle of the rink so that your combined momentum is zero. You then push one another and begin to roll apart. (a) (5 points) If your momentum is then 450 N-s to the left, what is your friend's mo- mentum (include magnitude and direction)? (b) (10 points) If the push lasted for 2s, what...
A 54-kg ice skater pushes off the wall of the rink, giving herself an initial speed of 3.5 m/s. She then coasts with no further effort. The frictional coefficient between skates and ice is 0.025. How far does she go? Express your answer with the appropriate units.
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