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QUESTION 8 An ice skater pushes off the wall and begins to slide across the ice....
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 0.022. how far does she go before she stops?
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.
A 65-kg ice skater stands facing a wall with his arms bent and then pushes away...
A 65-kg ice skater stands facing a wall with his arms bent and then pushes away from the wall by straightening his arms. At the instant at which his fingers lose contact with the wall, his center of mass has moved 0.50 What is the average force exerted by the wall on him? What is the work done by the wall on him? What is the change in the kinetic energy of his center of mass? Express you answers in...
An ice skater spinning with outstretched arms has an angular speed of 5.0rad/s . She tucks...
An ice skater spinning with outstretched arms has an angular speed of 5.0rad/s . She tucks in her arms, decreasing her moment of inertia by 29% . What is the resulting angular speed? rad/s By what factor does the skater's kinetic energy change? (Neglect any frictional effects.) where does the extra kinetic energy come from?
You slide down two consecutive slopes of frictionless ice whose vertical heights h are identical, as...
You slide down two consecutive slopes of frictionless ice whose vertical heights h are identical, as shown below. Which of the following statements must be true? (1) The change in your kinetic energy is identical for the motion from A to B and from B to C. (2) The work done on you by the gravitational force is smaller for the motion from A to B than from B to C. (3) The work done on you by the gravitational...
1) Tyrion is pulling a 30 kg sled loaded with ale across an ice lake. Assume...
1) Tyrion is pulling a 30 kg sled loaded with ale across an ice lake. Assume the sled starts from rest and that it moves a distance of 10 m to the right. He pulls the sled to the right with a force of 300 N at angle of 30° above the horizontal. Once again, Cersei is trying to stop Tyrion from leaving and pulls on the sled horizontally to the left with a force of 100 N. Find the...
1. A 67-kg base runner begins his slide into second base when he is moving at...
1. A 67-kg base runner begins his slide into second base when he is moving at a speed of 4.5 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to friction acting on the runner? (b) How far does he slide? 2. A 0.32-kg stone is held 1.4 m above the top edge of a...
#13) multi-question. Provided useful equations. Question 13 [8] A baseball player slides to 3rd base. A...
#13) multi-question. Provided useful equations.
Question 13 [8] A baseball player slides to 3rd base. A friction force (1) acts against his motion as indicated in the figure. He needs to slide a distance d of 2.5 m to be safe. (a) Use the work-energy theorem with non-conservative forces to write down an equation to find the actual distance the player slides. (b) If he starts sliding with an initial velocity of 5.0 m/s and the coefficient of kinetic friction...
QUESTION 1 A ball of mass 5.0kg is lifted off the floor a distance of 1.7m....
QUESTION 1 A ball of mass 5.0kg is lifted off the floor a distance of 1.7m. 1. What is the change in the gravitational potential energy of the ball? 2. Now you release the ball from rest, and it falls to the floor. What is the kinetic energy of the ball just before it hits the floor? 3. What is the velocity of ball just before it hits the floor? QUESTION 2 Suppose that the ball in the last question...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
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.
You slide down two consecutive slopes of frictionless ice whose vertical heights h are identical, as shown below. Which of the following statements must be true? (1) The change in your kinetic energy is identical for the motion from A to B and from B to C. (2) The work done on you by the gravitational force is smaller for the motion from A to B than from B to C. (3) The work done on you by the gravitational...
1) Tyrion is pulling a 30 kg sled loaded with ale across an ice lake. Assume the sled starts from rest and that it moves a distance of 10 m to the right. He pulls the sled to the right with a force of 300 N at angle of 30° above the horizontal. Once again, Cersei is trying to stop Tyrion from leaving and pulls on the sled horizontally to the left with a force of 100 N. Find the...
#13) multi-question. Provided useful equations.
Question 13 [8] A baseball player slides to 3rd base. A friction force (1) acts against his motion as indicated in the figure. He needs to slide a distance d of 2.5 m to be safe. (a) Use the work-energy theorem with non-conservative forces to write down an equation to find the actual distance the player slides. (b) If he starts sliding with an initial velocity of 5.0 m/s and the coefficient of kinetic friction...
QUESTION 1 A ball of mass 5.0kg is lifted off the floor a distance of 1.7m. 1. What is the change in the gravitational potential energy of the ball? 2. Now you release the ball from rest, and it falls to the floor. What is the kinetic energy of the ball just before it hits the floor? 3. What is the velocity of ball just before it hits the floor? QUESTION 2 Suppose that the ball in the last question...
Question 1 1 pts What is the kinetic energy of a man who weighs 980N who is riding in a car traveling 40 km per hour? Express your answer in Joules, but don't type the unit in the answer box. Round to the nearest whole number. (Careful with the units) 1 pts Astudent slides her 80.0-kg desk across the level floor of her dormitory room a distance 4.00 m at constant speed. If the coefficient of kinetic friction between the...
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