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Here we have to give the answer of free fall motion and reason how motion along x-axis different from motion along y-axis.
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- 10. How much horizontal force is needed to produce an acceleration of 8 m/sec² on a 75 kg box? A. 600 N B. 500 N C. 400 N D. 200 N 11. g=32.2 ft/sec². How is it expressed in SI? A. 9.81 m/sec² B. 9.86 m/sec² 12. What path does a projectile follow? A. ellipse B. parabola C. 9.08 m/sec² C. part of a circle D. 9.91 m/sec² D. hyperbola1. Neglecting air resistance, how much would you have to raise the vertical height if you wanted to triple the impact speed of a falling object? a. 4 times b. 9 times c. triple d. double14. What will the spring scale read for a 55kg student in an elevator that moves upward with a constant speed of 6m/s? A. 520N B. 530N C. 540N D. 550N
- 17. Graph-it-all analysis. The following are a y-t plot, two v-t plots, and an a-t plot. Which of them best describes an object in free fall? y A. t Vy B. t Vy C. ay D. t3. One object dropped from the top of a tall building, and one second later a second object is dropped. Neglecting air resistance, the distance between the falling objects will a. Be constant b. Decrease c. Increase d. Depend on their weight e. Depend on the speed of the plane. Explain your reasoning:9. SCALARS AND VECTORS: The figure below shows three forces F1, F2, and F3 acting on a point O. Calculate the resultant force. Here are the choices: 2.805 N 2.805 N 3.775 N 3.775 N 4.356 N 4.356 N 5.136 N
- 8. The total force acting on an abject points to the left. Two of the three forces are shown in the figure. Where should be the missing third force pointing? Two of the three forces exerted on an object F, b. 9. A ball rolls down a slope and aff a flat flaar. Ignaring air resistance, what force or farces act on the ball as it moves through the air just after leaving the flat floor? a. The weight of the ball acting vertically down. b. A horizontal force that maintains the motion. C A force whose direction changes as the direction of motion changes. d. The weight of the ball and a horizontal force. e. The weight of the ball and a force in the direction of motion. 10. A steel bar hangs from a cable as a crane tifts it. What forces act on the bar? a. Gravity b. Gravity and tension in the cable c. Gravity and a force of motion d. Gravity and tension and a force of motion7:14 ...leet02-xythos.content.blackboardcdn.com K Basics of Forces and Motion Use a virtual simulation to explore the basics of forces and motion. To access this activity, please visit: https://phet.colorado.edu/. Search for Forces and Motion: Basics (HTML5). Click Play. G Anytime you need to reset the simulation to default values, click the Reset button: Click the Net Force option. Check the boxes next to Sum of Forces, Values, and Speed: N 1. Explore the simulation by placing red and blue figures on the rope to simulate a tug of war. What is the exact measurement of forces that each size figure can pull the rope? a. Small: b. Medium: c. Large N N LTE Sum of Forces Values ✔Speed 2. Place two small blue figures on the left against 1 medium red figure on the right. Click Go! a. Which statement below best describes the resulting motion? (circle one) i. The speed is zero. ii. The speed is non-zero and constant. iii. The speed increases to the right. iv. The speed increases to the left. b.…2. What are the formulas used in solving free fall? Write them below and indicate what they are for.
- 3. A 12-kg box is released from the top of an incline that is 5.0 m long and makes an angle of 40 degrees to the horizontal. A 60-N friction force impedes the motion of the box. What will be the acceleration of the box? How long will it take to reach the bottom of the incline?As the force of gravity increases, escape speed. A. Increases B. Decreases C. Remains the same7. Block Aslides to the left with an initial speed of 2 m/s with respect to the ground on a transmission belt moving at 3 m/s. The friction coefficient between the block and the A VB transmission belt is 0.4. How long does it take for the block's relative specd with respect to the transmission belt to be zero?