+200 pts /500 Question 4 of 5 > O Macmillan Learning Resources Hint Submit Answer bo A student stays at her initial position for a bit of time, then walks slowly in a straight line for a while, then stops to rest a while, and finally runs quickly back to her initial position along a straight line. Which of the following statements is true about the average speed and the magnitude of the average velocity of the student during her trip? The student's average speed and velocity cannot be compared without knowing the farthest point she reached. ☐ Her average speed is greater than the magnitude of her average velocity. ◇ Her average speed is less than the magnitude of her average velocity. Her average speed is the same as the magnitude of her average velocity.

A ball is thrown up with an initial speed of 43.0 m/s a) what is the ball's speed at its highest position? b) how long does it take the ball to reach its highest position? c) what is the magnitude of the ball"s acceleration at its highest position? d) what is the distance between the initial and highest position of the ball? e) what is the ball's speed when it comes back to its initial position?

An object moves so that its position depends on time as x=−10m+(5m/s)t+(2.5m/s2)t2. Which statement below is not true? a) The object never stops moving. b) The object first moves in the negative direction and then in the positive direction c) The object is accelerating d) The speed of the object is always increasing Which answer is correct and why?

Which of the following descriptions corresponds to a ball tossed vertically upward? Air resistance can be neglected. a. The velocity decreases linearly from v_0 to v_f, with v_0>0 and v_f<0. b. The velocity increases linearly from zero to v_f. c. The position first increases linearly and then decreases linearly as a function of time. d. The acceleration decreases linearly from g to zero.