A 75 kg hunter, standing on frictionless ice, shoots a 42 g bullet horizontally at a speed of 530 m/s. Part A What is the recoil speed of the hunter? Express your answer with the appropriate units.
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- A 0.055-kg egg falls off a table that is 1.2 m high and lands on a tile floor. Part A What is the impulse delivered to the egg by the floor? Assume that the positive direction is upward. Express your answer with the appropriate units. Part B The egg lands on its side, and at the instant of impact the part of the shell farthest from the floor is 40 mm above the floor. The collision continues until the center of mass is on the floor. Estimate the time interval over which the collision lasts, assuming that the speed of the center of mass of the egg drops to zero linearly in time. Express your answer with the appropriate units. Part C What is the average force exerted by the floor on the egg? Assume that the positive direction is upward. Express your answer with the appropriate units. Part D If the floor were carpeted, the collision time interval might be extended by as much as a factor of four as the carpet "gives" under the egg. What would the average force…An ice hockey player of mass m1 = 81.5 kg hits a puck of mass m2 = 0.165 kg, giving the puck a speed of v = 35 m/s. a. If both are initially at rest and if the ice is frictionless, how far, in terms of the variables in the problem, does the player recoil in the time it takes the puck to reach the goal, a distance d away? b. If both are initially at rest and if the ice is frictionless, how far, in centimeters, does the player recoil in the time it takes the puck to reach the goal, 15 m away?At one particular moment, a 19.0 kg toboggan is moving over a horizontal surface of snow at 4.60 m/s. After 7.50 s have elapsed, the toboggan stops. Use a momentum approach to find the magnitude of the average friction force (in N) acting on the toboggan while it was moving. N
- 8 3 L5 R %24 Part A A 0.149 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.750 m/s. It has a head-on collision with a 0.290 kg glider that is moving to the left with a speed of 2.21 m/s. Suppose the collision is elastic. Find the magnitude of the final velocity of the 0.149 kg glider. Submit Request Answer Part B Find the direction of the final velocity of the 0.149 kg glider. O to the right O to the left Submit Request-Answer Part C Find the magnitude of the final velocity of the 0.290 kg glider. Submit Request Answer Part D Find the direction of the final velocity of the 0.290 kg glider. O to the right O to the left Submit Request Answer 000 000 DD F7 2 F3 F4 F5 F6 %23 & 3. 9 7. 6two shuffleboard disks of equal mass, one orange, and the other green are involved in an elastic glancing collision. the green disk is initially at rest and is struck by the orange disk moving initially to the right at voi=5.95 m/s as in figure a, after the collision, the orange disk moves in a direction that make an angle of theatre =34.0 degrees with the horizontal axis makes an angle =56.0 degrees. determine the speed of each disk after the collision.Why is the selected answer wrong? What is the correct answer?
- The parking brake on a 1000 kg Cadillac has failed, and it is rolling slowly, at 1 mph, toward a group of small children. Seeing the situation, you realize you have just enough time to drive your 2000 kg Volkswagen head-on into the Cadillac and save the children. Part A With what speed should you impact the Cadillac to bring it to a halt? Express your answer in miles per hour. V= ΕΙ ΑΣΦ ? mphThe figure below shows a bullet of mass 230g traveling horizontally towards the east with a speed of 415m/s, which strikes a block of mass 7.5kg that is initially at rest on a frictionless table. After striking the block, the bullet is embedded in the block and they begin to move as one unit. A. What is the magnitude (in m/s) and direction of the velocity of the block/bullet unit immediately after the impact? B. What is the magnitude (in N * s) and direction of the of the impulse of the block on the bullet? C. What is the magnitude ( in N *s) and direction of the impulse of the bullet and the block?Force Exerted on an Object vs. Time 8 3 Time (s) Which of the following statements about the graph is correct? Your answer: O The area between the line and the x-axis could be the object's change in momentum (or impulse). O The area between the line and the x-axis could be the power exerted on the object. O The slope of the line could be the object's change in momentum (or impulse). O The slope of the line could be the power exerted on the object. O Neither of these values could be found from the graph. Force (N) 00
- A student throws a 110 g snowball at 8.5 m/s at the side of the schoolhouse, where it hits and sticks. ▼ Part A What is the magnitude of the average force on the wall if the duration of the collision is 0.19 s? Express your answer with the appropriate units. F=-3.68 Submit HA Provide Feedback N ? Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Next >Part A A tennis ball of mass m = 0.060 kg and speed v = 29 m/s strikes a wall at a 45° angle and rebounds with the same speed at 45°. (Figure 1) What is the magnitude of the impulse given to the ball? Express your answer to two significant figures and include the appropriate units. µA а xa Xb X•10" FAt = 1.82808 kg S Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Part B What is the direction of the impulse given to the ball? Figure 1 of 1 upward downward to the left to the right 450 Submit Previous Answers 450 Correct 圓A white billiard ball, moving horizontally strikes the number 2 billiard ball, at rest. Before impact, the white ball was moving at a speed of 3.50 m/s and angle of 23° from the horizontal, and after impact it is moving at 0.75 m/s at 47° from the horizontal. a. If the two balls have equal masses of 140 g, what is the velocity of the red ball after the impact? Include its magnitude and direction.