BackAs shown in Fig. 4–48, five balls (masses 2.00, 2.05, 2.10, 2.15, 2.20 kg) hang from a crossbar. Each mass is supported by '5-lb test' fishing line which will break when its tension force exceeds 22.2 N (5.00lb). When this device is placed in an elevator, which accelerates upward, only the lines attached to the 2.05 and 2.00 kg masses do not break. Within what range is the elevator's acceleration?
An inclined plane, fixed to the inside of an elevator, makes a 38° angle with the floor. A mass m slides on the plane without friction. What is its acceleration relative to the plane if the elevator falls freely?
A 6750-kg helicopter accelerates upward at 0.80m/s2 while lifting a 1080-kg frame at a construction site, Fig. 4–66. What is the tension in the cable (ignore its mass) which connects the frame to the helicopter?
A 6750-kg helicopter accelerates upward at 0.80m/s² while lifting a 1080-kg frame at a construction site, Fig. 4–66.
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(c) What force does the cable exert on the helicopter?
A wet bar of soap (m = 150g) slides freely down a ramp 3.0 m long inclined at 8.5°. How long does it take to reach the bottom? How would this change if the soap's mass were 250 g?
A 265-kg load is lifted 18.0 m vertically with an acceleration a = 0.140 g by a single cable. Determine the tension in the cable.