A 0.70 kg ball moving horizontally at 5.0 m/s strikes a vertical wall and rebounds with speed 2.0 m/s. What […]
Physics
2 Ricardo, of mass 80 kg, and Carmelita, who is lighter, are enjoying Lake Merced at dusk in a 30 kg […]
Ricardo of mass 80 kg and Carmelita
When startled an armadillo will leap upward. Suppose it rises 0.544 m in the first 0.200 s. (a) What is […]
When startled an armadillo will leap upward
The space probe Pioneer 11 was launched April 5, 1973, and reached Jupiter in December 1974, traveling a distance of […]
The space probe Pioneer 11 was launched
When a high-speed passenger train traveling at 161 km/h rounds a bend, the engineer is shocked to see that a […]
When a high-speed passenger train traveling
You are arguing over a cell phone while trailing an unmarked police car by 25 m; both your car and […]
You are arguing over a cell phone while trailing
In the figure, a red car and a green car, identical except for the color, move toward each other in […]
A red car and a green car, identical except
A car traveling 56.0 km/h is 24.0 m from a barrier when the driver slams on the brakes.The car hits […]
A car traveling 56.0 km/h is 24.0 m from
A world’s land speed record was set by Colonel John P. Stapp when in March 1954 he rode a rocket-propelled […]
A rocket-propelled sled that moved along a track
Suppose a rocket ship in deep space moves with constant acceleration equal to , which gives the illusion of normal […]
Suppose a rocket ship in deep space moves
The brakes on your car can slow you at a rate of . (a) If you are going 137 km/h […]
The brakes on your car can slow you
A certain elevator cab has a total run of 190 m and a maximum speed of 305 m/min, and it […]