Adolf and Ed are wearing harnesses and are hanging at rest from the ceiling by means of ropes attached to them. Face to face, they push off against one another. Adolf has a mass of 120 kg, and Ed has a mass of 84 kg. Following the push, Adolf swings upward to a height of 0.61 m above his starting point. To what height above his own starting point does Ed rise?
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- A student (m = 58 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting on him during the collision is that due to the ground. H=As a science fair project, you want to launch an 700 g model rocket straight up and hit a horizontally moving target as it passes 26.0 m above the launch point. The rocket engine provides a constant thrust of 17.6 N. The target is approaching at a speed of 17.0 m/s. # 3 E D 80 F3 C 4 R F 888 V % 5 F5 T G ^ 6 B ▼ Part A At what horizontal distance between the target and the rocket should you launch? Express your answer with the appropriate units. FO Provide Feedback Y Value Submit MacBook Air H HA & 7 N F7 Request Answer U ** → 8 Units DII FB 1 M wwww. ? ( 9 K DD O :) O F10 P F11 1What is the magnitude of the force that stops the baseball? What force does the baseball exert on your head? Are you in danger of a fracture if the ball hits you in the forehead? On the cheek?
- There are 5 possbile other answer choices, thank you so much! Moves downward with 2.45 m/s^2 Moves upward with constant velocity stays at rest moves downward with constant velocity moves upward with 0.48 m/s^2A spring (spring1) of initial length L10 and spring constant kl is hanging down the ceiling, with a ball (ball1) of mass m1 attached to the bottom of the spring. Another spring (spring2) of initial length L 20 and spring constant k2 is hanging down from ball1 with another ball (ball2) of mass m2 attached to the bottom of spring2. Use g to denote gravity, t is time, L1 is the position of ball1 minus the ceiling, L2 is the position of ball2 minus ball1, the velocity of ball1 is v1, and the velocity of ball2 is v2. What is the expression of the net force Fnet1 and Fnet2 acted upon ball1 and ball2?Two boxes, Box A and Box B, are given an initial push and start moving at equal speed along a level, frictionless surface. The Box B has twice the mass of Box A. They both slide up the same frictionless incline plane. Which box rises to a greater height? Group of answer choices A) Box A rises to the greater height because it weighs less. B)The two objects rise to the same height. C) Box B rises to the greater height because it contains more mass. D) Box A rises to the greater height because it possesses a smaller amount of kinetic energy. E) Box B rises to the greater height because it possesses a larger amount of kinetic energy.
- vo t = 0 t = 3.5 s vo = (2.5i + 3.5j) m/s i = (-2.51) m/s The velocity of a 3.0-kg object is shown at two times. What was the magnitude of the average force exerted on the object between t= 0 and t = 3.5s? O 1.74 N O 6.26 N O 14.7 N O 3.23 N O 0.845 N23. Two blocks are attached to a light string. Block A (mA=7.9kg) is at rest on a frictionless table. Block B (mB=1.36kg) hangs off the edge of the table, as shown. Both blocks are released from rest.Using the single-system approach, what is the acceleration of the system?a= ms2 Block A is on a table and block B is hanging off the table on a rope connecting the two blocks*Round your answer to the nearest thousandth if necessary.Some salvage divers are raising a rectangular box of treasure measuring1m × 1.3m × 1.9m from the bottom of the sea. They are using a cable which can handle a maximum force of 10 000 N without breaking. They raise the treasure from the bottom of the ocean at a constant speed. All goes well while the treasure is rising through the water but much to the despair of the salvors as soon as the treasure is clear of the water the cable breaks, dropping the treasure back into the briny deep. What are the maximum and minimum possible weights of the lost treasure?