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BAED-PHYC2121 General Physics 1
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The nuclei of atoms contain
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4.6 Projectile Motion Revisited: The Effect of Air Drag
A sphere is dropped from a great height and when its speed reaches 20 m/s, its acceleration downward is 8.4 m/s2. If the drag force is proportional to the square of the speed, what will be its acceleration downward when its speed reached 40 m/s?0%
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The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 15-kg object at 8.0 m/s2 on the moon?
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A helicopter is traveling at 40 m/s at a constant altitude of 200 m over a level field. If a wheel falls off the helicopter, with what speed will it hit the ground? (g = 9.8 m/s2 and air resistance negligible)
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4.1 Statics
A 25-g traffic light hangs midway on a cable between two poles 40 meters apart. If the sag in the cable is 0.40 meters, what is the tension in each side of the cable?0%
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3.2 Normal Forces and Weight
A 70.0-kg man jumps 1.00 m down onto a concrete walkway. His downward motion stops in 0.04 seconds. If he forgets to bend his knees, what force is transmitted to his leg bones?0%
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Starting from rest, a car accelerates down a straight road with constant acceleration a1 for a time t1, then the acceleration is changed to a different constant value a2 for an additional time t2. The total elapsed time is t1 + t2. Can the equations of kinematics be used to find the total distance traveled?
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1.4 Physical Quantities and Units of Measure
A furlong is a distance of 220 yards. A fortnight is a time period of two weeks. A horse is running at a speed of 4.00 yards per second. What is his speed in furlongs per fortnight?0%
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A strobe photograph shows equally spaced images of a car moving along a straight road. If the time intervals between images is constant, which of the following cannot be positive?
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Vector 
is 3.0 units in length and points along the positive x-axis; vector 
is 9.0 units in length and points along a direction 120° from the positive x-axis. What is the direction of the resultant with respect to the positive x-axis?
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