If a ball is thrown straight up into the air with an initial velocity of 75 feet/ sec, its height in feet after t seconds is given by y =75t - 16t^2 . Find the average velocity for the time perio If a ball ...
B. A parabola opening upwards and then downwards. C. A horizontal line. D. A curve that continuously goes up. 相关知识点: 试题来源: 解析 B。解析:球被竖直上抛,高度随时间变化先上升后下降,图像是开口向上然后开口向下的抛物线。A 选项直线上升不符合球会下落;C 选项水平线表示高度不变;D 选项...
Question 9 A ball is thrown into the air and it moves in the path shown below. Ignore air resistance in this question.A BAt position A the ball is at the highest point in its path, position B is just before it hits the groun d. Which of the following statements is true? a a. ...
A 8.3% B 12% C 83% D 85% © UCLES 2018 9702/13/M/J/18 [Turn over 10 16 A ball is thrown vertically up into the air. It rises to the top of its path before beginning to fall vertically downwards. top of path midpoint of path starting position Assume that the gravitational ...
<p>To find the maximum height reached by a ball thrown upwards with an initial speed of 4.0 m/s, we can use the equations of motion under gravity. Here’s a step-by-step solution:</p><p><strong>Step 1: Identify the known values</strong> - Initial velocit
Consider a ball thrown straight up in the air. At what position is its kinetic energy maximum? Kinetic Energy: An object in motion has energy in the form of kinetic energy. This energy depends on the mass and velocity of the moving body. A moving object ...
A ball is thrown eastward into the air from the origin (in the direction of the positive x-axis). The initial velocity is 50 i+80 k , with speed measured in feet per second. The spin of the ball results in a southward acceleration of 4 ft/s...
26 A small ball is thrown into the air from a point that is I m above horizontal ground.The ball moves vertically upwards so that at time t seconds after the ball was thrown, the height, h metres, of the ball above the ground is given by h=1+kt-5t^2 where k is a constant....
Assume air resistance is negligible. What is the initial speed with which the ball is thrown? A 3.07 m s–1 B 7.85 m s–1 C 15.7 m s–1 D 31.4 m s–1 6 A radio-controlled toy car travels along a straight line for a time of 15 s. The variation with time t of the velocity...
Answer to: A ball is thrown vertically upward with a speed of 17 m/s. How long does the ball take to hit the ground after it reaches its highest...