An astronaut with a mass of 75.8kg, finds herself 34.7m from her spaceship. The only way for her to return to the ship is to throw her 0.450kg wrench directly away from the ship. If she throws the wrench with a speed of 20.3m/s, how many seconds does it take her to reach the ship?

The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 57 km/s. lo the crow's great surprisc, a Klingon ship is 150 km directly ahead, traveling in the same direction at a mere 21 km/s. Without evasive action, the Enterprise will overtake and collide with the Klingons in just about 4 5s The Enterprise's computers react instantly to brake the ship. What magnitude acceleration does the Enterprise need to just barely avoid a collision with the Klingon ship? Assume the acceleration is constant Hint: Draw a position versus time graph showing the motions of both the Enterprise and the Klingon ship. Let æn - 0km be the location of the Interprise as it returns from warp drive I low do you show graphically the situation in which the collision is "barely avoided"? Once you decide what it looks like graphically, express that situation mathematically. Express your answer to two significant figures and include the appropriate units. a = μA Value m s² Review |…

An electron is moving in a straight line with a initial speed of3E5 m/s. It then undergoes an accelerates 8E14m/ s. How long will it take to reach a speed of 5.4E 5m/s?

You and a friend ride your bikes to a restaurant across town. Both of you start at the same instant from your house, you riding 10 m/s and your friend riding 12 m/s. During the trip your friend has a flat tire and that takes him 8 minutes to fix. He then continues the trip at the same speed of 12 m/s. If the distance to the restaurant is 10 km, who gets there first?

OK, this is the last time for one of these crazy adventures. THIS time, though, there is a window in the floor, and you can see that you re in a rocket which has just taken off from the surface of an alien planet. By taking careful measurements out that window you determine that the rocket is accelerating upward at 9.60 m/s^2. When you drop a ball from a height of 1.20 m, it hits the floor 0.362 s later. What is the value of g for the alien world below you?     16.5 m/s^2     8.7 m/s^2     28.1 m/s^2     18.4 m/s^2

1. You are standing on a cliff of height h = 1.5m. You throw a ball straight down towards the ground below at a speed of v, = 0.4m/s. How long does it take for the ball to hit the ground?

An electric skateboarder is travelling west on a path along the river at 5m/s. A brisk walker on the other side of the riverbank is walking east along a path at 3m/s. The two paths are 40m apart. The skateboarder is initially 600m east of the walker. After 60 seconds, how fast is the distance between the skateboarder and the walker changing?

OK, yet another strange awakening in a room with no windows. This time you drop a ball from a height of 1.67 m and it hits the floor 0.292 s after you drop it. This time you suspect you are on a rocket that has just left the surface of the Earth, and is still not too far above the ground. What do you deduce the rocket s acceleration to be? 1 58.8 m/s^2 29.4 m/s^2 3 49.0 m/s^2 4 39.2 m/s^2

Abby throws a ball straight up and times it. She sees that the ball goes by the top of a flagpole after 0.400 s and reaches the level of the top of the pole after a total elapsed time of 4.00 s. What was the speed of the ball at launch?

A book slides horizontally off a shelf 2.8 meters above the floor, at a velocity of 0.25 m/s.  How far from the shelf does it land?