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1. Which of Newton's laws of motion accounts for the movement seen in an ice hockey puck sliding at a constant speed across a rink?
2. Which of Newton's laws of motion accounts for the movement seen in a distance runner maintaining their pace in the middle of a race?
3. Which of Newton's laws of motion accounts for the movement seen in dissimilar pitchers with different maximum velocities for their fast balls?
4. Which of Newton's laws of motion accounts for the movement seen in a high jumper’s GRF through takeoff?
A child slides across a floor in a pair of rubber-soled shoes. Thefriction force acting on each foot is 20.0 N. The footprint area ofeach shoe sole is 14 cm2, and the thickness of eachsole is 5 mm. Find the horizontal distance by which the upper a..
The brakes are applied to a car traveling on a dry, level highway. A typical value for the magnitude of the car'sacceleration is 5.35 m/s2. If the car's initial speed is 29.7 m/s, how long does it take to stop and how far does it travel, starting ..
Two equal forces are applied to a door. The first force is applied at the midpoint of the door; the second force is applied at the doorknob. Which force exerts the greater torque
a good baseball pitcher can throw a baseball toward home plate at 83 mih with a spin of 1625 revmin. how many
A robot holds a 20 meter long steel wire of diameter =2 cm that has a load of 25,000 N on it.. How much will the wire stretch under the load? What is the stress on the wire?
An 8.05-kg stone at the end of a steel (Young's modulus 2.0 x 1011 N/m2) wire is being whirled in a circle at a constant tangential speed of 19.7 m/s. Find the strain in the wire
A particle undergoes two displacements. The first has a magnitude of 175 cm and makes an angle of 120.0° with the positive x axis. Find the magnitude and direction of the second displacement
A 0.480 kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 24.0 N/m. How far does the putty-block system compress the spring
A plastic bag is filled with hydrogen at atmospheric pressure and 26.0 oC. How large a volume of hydrogen (in m3) is required
A car traveling 56 km/h is 23.0 m from a barrier when the driver slams on the brakes. What was the car's constant deceleration before impact
Calculate the net impulse delivered to a 138-kg quarterback initally running at 4.5 m/s if he's hit by a defending player and slowed to a speed of 1.1 m/s
a parallel-plate capacitor is designed so that the plates can be pulled apart. the capacitor is initially charged to a
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