Latest Questions & Answers

Q: A motorist drives north for 35.0 minutes at 85.

A motorist drives north for 35.0 minutes at 85.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130. km in 2.00 h. (a) What is his total displacement? (b) What is his ave...

Q: A graph of position versus time for a certain particle moving along

A graph of position versus time for a certain particle moving along the x - axis is shown in Figure P2.6. Find the average velocity in the time intervals from (a) 0 to 2.00 s, (b) 0 to 4.00 s, (c) 2.0...

Q: A tortoise can run with a speed of 0.10 m

A tortoise can run with a speed of 0.10 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.0 minutes. The tortoise wins by a shell...

Q: A person takes a trip, driving with a constant speed of

A person takes a trip, driving with a constant speed of 89.5 km/h, except for a 22.0-min rest stop. If the person’s average speed is 77.8 km/h, (a) How much time is spent on the trip and (b) How far d...

Q: A racing car starts from rest and reaches a final speed v

A racing car starts from rest and reaches a final speed v in a time t. If the acceleration of the car is constant during this time, which of the following statements must be true? (a) The car travels...

Q: A skydiver jumps out of a hovering helicopter. A few seconds

A skydiver jumps out of a hovering helicopter. A few seconds later, another skydiver jumps out, so they both fall along the same vertical line relative to the helicopter. Assume both skydivers fall wi...

Q: The cheetah can reach a top speed of 114 km/h

The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 45 m in a straight line, reaching a final speed of 72 km/h. (a) D...

Q: A ball is thrown straight up in the air. For which

A ball is thrown straight up in the air. For which situation are both the instantaneous velocity and the acceleration zero? (a) On the way up (b) At the top of the flight path (c) On the way down (d)...

Q: A jet plane has a takeoff speed of υto = 75 m

A jet plane has a takeoff speed of υto = 75 m/s and can move along the runway at an average acceleration of 1.3 m/s2. If the length of the runway is 2.5 km, will the plane be able to use this runway s...

Q: Express the location of the fly in Problem 40 in polar coordinates

Express the location of the fly in Problem 40 in polar coordinates. Data from Problem 40: A certain corner of a room is selected as the origin of a rectangular coordinate system. If a fly is crawling...