An object is launched upward. While it is moving upward, which of the following statements is accurate? 1. Velocity is positive, and acceleration is negative.
2. Velocity is negative, and acceleration is negative.
3. Velocity is positive, and acceleration is positive.
4. Velocity is negative, and acceleration is positive.

Player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. what is the horizontal velocity component of the ball to the nearest tenth of a m/s?

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?