- 2005 18. A person holds a 80-N weight 2 m above the floor for 30...
The figure shows a person whose weight is W 700 N doing push-ups. Find the normal force exerted by the floor on (a) each hand and (b) each foot, assuming that the person holds this position. 0.410 m 0.840 m Units (a) Number Units (b) Number
The drawing shows a person (weight W = 577 N, L1 = 0.826 m, L2 = 0.418 m) doing push-ups. Find the normal force exerted by the floor on each hand and each foot, assuming that the person holds this position. - I am super lost on this. I got 96.94N and 191.56N and it said it was wrong. :(
2. A person is holding a weight (100 N) in their hand. The weight is a distance of 0.3 meters from the center of rotation of the elbow. If the forearm is parallel to the ground, what is the torque about the elbow due to the weight? If the forearm has an angle of 30° above the horizontal (hand is higher than elbow), what is the torque about the elbow due to the weight? c. If an elbow flexor muscle...
i and 3.00 m long, are hinged at point A and tied together by a horizont Two ladders, 4.00 m a al rope 0.90 m above the floor. The ladders weight 480 N and 360 N, respectively, and the center of gravity of each is at its cente frictionless. If an 800-N painter stands at p ope. Suppose the rope is 3/16 nches in diameter and has a tensile strength of 620 rope, and the magnitude of the force one...
011 (part 1 of 2) 10.0 points A 9.3 m ladder whose weight is 225 N is placed against a smooth vertical wall. A person whose weight is 863 N stands on the ladder a distance 2.7 m up the ladder. The foot of the ladder rests on the floor 6.603 m from the wall. 9.3 m 225 N 863 N XXX 6.603 m OS Calculate the force exerted by the wall. Answer in units of N. 012 (part 2...
A 9-m long plank of weight 80 N is supported by two vertical posts at the two ends. If a 25-N person stands at 6 m from the right end of the plank. a) The force on the left post is _____ N. b) The force on the right post is ____ N. Suggestion: Draw a sketch to determine forces and torques
A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20 m/s^2. What is the magnitude of the normal force of the elevator floor on the dog? An astronaut's weight on earth is 80 N. What is his weight on Mars where g = 3.76 m/s^2? (a) How much work does an elevator motor do to lift a 1000 kg elevator a height of 100 m? (b) How much power does the motor supply...
QUESTION 13 Q13 (LO2) [2.5 Marks] A 68-kg person gets into an elevator at the lobby level of a hotel together with his 25-kg suitcase, and gets out at the 10th floor 40 m above. Answer the following questions (by matching the question with correct answer letter) Take g 9.81 m/s2 36.5 kJ What is the amount of energy in kJ consumed by the B. motor of the elevator that is now stored in the suitcase 9.8 kJ and the...
You hold a 500 N barbell 0.5 m above a level floor for 100 s . During this time, the amount of work you do on the barbell is
a rifle with a weight of 30 N fires a 5.0-g bullet with a speed of 300 m/s. a) find the recoil speed of the rifle.b) if a 700-N man holds the rifle firmly against hisshoulder, find the recoil speed of the man and rifle.