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a. You throw a bouncy ball directly down toward the ground. When it leaves your hand, 1 m above the ground, it is moving at 5 m/s. What is the ball's maximum height after it bounces?
b. You and your sled (m = 80 kg) start from rest at the top of a 7 m tall hill, slide down, and travel up to the top of the next hill, 3 m tall. At the peak of the second hill, you are traveling 1 m/s. How much work was done on you by friction?
A person wearing a seat belt can withstand an acceleration of -3.0 x 10^2 m/s^2. Explain how thick should barriers be to safely stop a car that hits a barrier at 110 km/h?
A charge of -2.87 ?C is fixed in place. From a horizontal distance of 0.0470 m, a particle of mass 7.43 x 10-3 kg and charge -9.14 ?C is fired with an initial speed of 60.0 m/s, How far does the particle travel before its speed is zero
If a wind begins blowing from the southwest at a speed of 110km/h (average), calculate the velocity (magnitude) of the plane
Find the distance from the mirror to the point where the reflected rays meet.
Imagine a "free" electron and a "free" proton held midway between the plates of a charged equivalent plate capacitor. When released, how do their accelerations and directions travel compare.
A .300kg mass attached to the end of a .75m string is whirled around on a smooth level table. If the maximum tension that the string can withstand is 250N, then what most tangential speed can the mass have if the string is not to break.
At the end of the run, she is 175 m away from the starting point at an angle of 15.0° north of west. Illustrate what were the direction and length of her second displacement? Use graphical techniques.
An 88 kg spacewalking astronaut pushes off a 640kg satellite, exerting a 640N force for the 0.60 s it takes him to straighten his arms.
The radius of the tires on your car is 0.33m. You drive 1400 m in a straight line. What is the angular displacement of a point on the outer rim of a tire, around the center of tire, during this trip? Suppose the tire rotates in the counter clockwise ..
A vertical spring with a spring steady of 420-N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest.
A jetliner can fly 5.32 hours on a full load of fuel. Without any wind it flies at the speed of 220 m/s. The plane is to make a round-trip by heading due west for a certain distance, turning around, and then heading due east for the return trip.
A 25g ball is fired with an initial speed v1 toward a 150g ball that is hanging motionless from a 1.30m string. The balls have a perfectly elastic collision. As a result, 150 g ball swings out until the string makes an angle of 37° with vertical. ..
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