Two small balls are thrown at the same instant from the same point on level ground, both at 20 m/s, in the same vertical plane and the same direction. One is thrown at 30° above the horizontal and the other at 60°. Ignore air resistance and take g = 10 m/s². What is the distance between the two balls 1.5 s after they are thrown?

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Two small balls are thrown at the same instant from the same point on level ground, both at $20\ \text{m/s}$ , in the same vertical plane and the same direction. One is thrown at $30^\circ$ above the horizontal and the other at $60^\circ$ . Ignore air resistance and take $g = 10\ \text{m/s}^2$ . What is the distance between the two balls $1.5\ \text{s}$ after they are thrown?

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← A satellite moves in a circular orbit of radius r round a planet. Its rocket fires for a very short time along its direction of motion and raises its speed by 10%. Which of the following statements are correct?A girl stands on a flat cart that moves along a straight, level track at 4.0 m/s. She throws a ball straight up, as she sees it, at 15 m/s relative to herself. At the moment of the throw, the cart begins to speed up with a steady acceleration of 2.0 m/s² along the track. Her hand stays at the same place on the cart. Ignore air resistance and take g = 10 m/s². When the ball comes back down to the height from which it was thrown, how far behind her hand is it? Give the answer in m. →

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