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An envelope slipped off your hand and is currently falling to the ground with constant speed. Would you call its motion free fall? Explain.
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- You are going to your hometown by a bus that is moving with constant speed. During the journey, if you toss a coin, will it fall to the same spot? If no/yes, ExplainDescribe the motion of an object in free fall Given a rock which is thrown up into the air into free fall. At it maximum height its velocity is zero. What is the acceleration of the rock at this instant? (let g = the acceleration due to gravity) a. one-half of g b. g2 c. -g d. 2g e. zeroOn takeoff, a rocket accelerates from rest at a rate of 50.0 m/s2 for exactly 1 minute. The rocket's speed after this minute of steady acceleration will be ____ m/s.
- A two-stage rocket accelerates from the rest at + 3.57 m /s/s 46.2 s . It then accelerates at + 2.98 m/s/s for another 5.90 seconds after the second stage it enters into stage of free fall. determine: a.maximum speed b. maximum altitude c.see the height of the rocket after 20.0 s d.the total time of the rocket is in the air assuming it is lunch from the groundA uniformly accelerated body takes 10 s to cover 500 m. Assuming that the body starts from rest, find (a.) its acceleration and (b.) the time it will take to cover the next 500 m.A rocket car is traveling at a constant speed of 250 km/h on a salt flat. The driver gives the car a reverse thrust, and the car experiences a continuous and constant deceleration of 8.25 m/s^2. How much time elapses until the car is 175 m from the point where the reverse thrust is applied? Describe the situation for your answer.
- Consider the following one-dimensional motions: (A) a ball thrown directly upward rises to a highest point and falls back into the thrower’s hand; (B) a race car starts from rest and speeds up to 100 m/s; and (C) a spacecraft drifts through space at constant velocity. Are there any points in the motion of these objects at which the instantaneous velocity has the same value as the average velocity over the entire motion? If so, identify the point(s).To test the quality of a tennis ball, you drop it onto the floor from a height of 4.00 m. It rebounds to a height of 2.10 m. Suppose the ball is in contact with the floor for 11.2 ms. (a) What is the magnitude of its average acceleration during the contact with the floor?-------- m/s2(b) Is the average acceleration up or down?A car, car 1 traveling at a constant velocity of 21 m/s passes another car, car 2 at rest. The moment car 1 passrs car 2, car 2 accelerates at a rate of 2 m/s2. Find the velocity of car 2 when it passes car 1.
- Suppose that a tennis ball is dropped from the top of a skyscraper. Taking the ball’s initial position zero (y=0) and choosing y-axis positive in the downward direction, for this free-fall motion, Draw the acceleration vs. time, velocity vs. time and position vs. time graphs. Calculate the position, velocity, and acceleration of the ball at t= 5.0 seconds. Use Kinematics equations. (g=9.80 mls2)Cite an example of something that undergoes acceleration while moving at constant speed. Can you also give an example of something that accelerates while traveling at constant velocity? Explain.two car with a distance of 100m between them are moving in the same direction with the same speed. At t=0 s , the cars start to apply constant acceleration with the same magnitude but in opposite directions, simultaneously. at the 5th second, the cars are the same position, and one of the cars is stopping. calculate the velocity of the moving car at the 5th second. (ıf you use g ; take g = 10m/s2)