Physics, 12.07.2019 22:10 jennychen2518pbmirn

Aperson rides a bicycle down the street. the position of a reflector attached to a point on the rim of one wheel is r- (0.5m) (cos(8.8t) - 8.8t)i + sin(8.8t)j where i is the unit vector pointing in the x-direction (horizontal) and j is the unit vector pointing in the y-direction (vertical), and t is measured in seconds. the position of the reflector in the formula is measured with respect to a stationary point on the ground the center of the wheel a stationary point at the same height above the ground as the center of the wheel hint: remember that the sine of an angle has a value between -1 and 1. can the reflector ever sink below the ground? what is the velocity of the reflector at the instant when it touches the ground? zero 4.4j

Answers: 1

Show answers

Another question on Physics

Physics, 21.06.2019 13:30

Explain how plate tectonics have changed earth’s surface over time. include the role of plate tectonics in the creation of landforms.

Answers: 3

Answer

Physics, 21.06.2019 17:00

Which of the following is considered to be a vector? a. temperature b. velocity c. time d. mass

Answers: 1

Answer

Physics, 21.06.2019 20:30

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

Answers: 1

Answer

Physics, 22.06.2019 10:40

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Answers: 1

Answer

You know the right answer?

Aperson rides a bicycle down the street. the position of a reflector attached to a point on the rim...

Questions