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- in the "tablecloth trick," a table is covered in a tablecloth and then set with various dishes and vases and other smooth objects. The person performing the trick then quickly jerks on the table cloth in a single fast motion that whips the tablecloth off the table, but leaves the dishes and other objects still in place on the table. Which of Newton's Laws is most applicable to explain why this trick works?Which of the following statement/s is/are correct regarding the concepts of motion? According to Aristotle, a body that is stationary will continue to be stationary unless a force is applied to it. According to Aristotle, a falling body accelerates because its weight increases as it approaches Earth’s surface. According to Galileo, a body in motion along a frictionless surface does not need an external force to maintain its motion. According to Galileo, objects fall at the same rate even if one object is more massive than the other object. 1 and 2 3 and 4 1,3, and 4 1,2,3 and 4 Which of the following is a correct explanation to one of the consequences of Special Relativity? A. Time Dilation describes that twins would have different age difference if they both travel close to the speed of light. B. Mass-energy Equivalence paved the way for humans to create grenades to be used during wars and political conflicts. C. Relativity of Simultaneity implies that two events would not…A car is moving along a frictionless surface with a speed of 2 m/s to the left. You and your friend each come over and push the car at the same time. You exert a force of 6 N to the left, while your friend exerts a force of 6 N to the right. According to Newton’s first law, how will this action affect the car’s motion? The car will speed up because your force is in the same direction of the car’s motion, making it speed up. The car will stop immediately because two balanced forces will cause an object to stop moving. The car will continue to move 2 m/s to the left because there are balanced forces acting on it. The car will continue moving to the left but at a slower speed because your friend’s force is going to make the car slow down.
- Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 6.2-kg projectile from rest to a speed of 3.1 × 103 m/s. The net force accelerating the projectile is 4.8 × 105 N. How much time is required for the projectile to come up to speed?Type your answer here Units Choose your answer hereWhich of the following observations would be adequately explained by Newton's third law? Question 5 options: 1) When turning a corner, a passenger in a car feels pushed against the door. 2) The friction of a surface causes a sliding object to come to rest. 3) A car's tires slip on an ice-covered surface. 4) One skater pushes against another and both move off in opposite directions. 5) The Earth is held in orbit around the Sun by a gravitational force of attraction.A student with a mass of 68 kg gets on a ferris wheel that rotates at a constant speed. When the ferris wheel reaches its top point, the reaction force applied by the seat to the student is 556 N. What is the reaction force the seat exerts on the student when the ferris wheel reaches its lowest point? (g = 9.8 m / s²)
- A flea jumps by exerting a force of 1.17 x 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 1.12 x 10-6 N on the flea. Find the direction and magnitude (in m/s²) of the acceleration of the flea if its mass is 6.0 × 10-7 kg. (Let us assume that wind points to the right. We will consider this to be the +x direction and vertical to be the +y direction.) magnitude direction m/s² ° (measured clockwise from the vertical)To understand Newton's 3rd law, which states that a physical interaction always generates a pair of forces on the two interacting bodies. In Principia, Newton wrote:To every action there is always opposed an equal reaction: or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts. (translation by Cajori) The phrase after the colon (often omitted from textbooks) makes it clear that this is a statement about the nature of force. The central idea is that physical interactions (e.g., due to gravity, bodies touching, or electric forces) cause forces to arise between pairs of bodies. Each pairwise interaction produces a pair of opposite forces, one acting on each body. In summary, each physical interaction between two bodies generates a pair of forces. Whatever the physical cause of the interaction, the force on body A from body B is equal in magnitude and opposite in direction to the force on body B from body A.Incidentally, Newton states that…A flea jumps by exerting a force of 1.32 x 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 1.18 x 10-6 N on the flea. Find the direction and magnitude (in m/s2) of the acceleration of the flea if its mass is 6.0 x 10-7 kg. (Let us assume that Fwind points to the right. We will consider this to be the +x direction and vertical to be the ty direction.) magnitude direction 27.73 x Did you draw a free-body diagram, and identify the forces acting on the flea? Consider the forces acting on the flea during the time it is in contact with the ground. m/s² 27.73 x Review vector components. In which of the four quadrants is the resultant force located? (measured clockwise from the vertical)
- Three blocks A, B, and C stand next to each other as shown in the figure. A force F with magnitude 199.4 N is applied to push block C directly and sends the blocks accelerating to the right. Let's assume there is no friction between the blocks and the ground. The mass of A, B, and C are 7, 45, and 94.7 kg, respectively. What is the force applied on block B by block C (in unit of N)? C A TextAn object with a mass of 7.5 kg accelerates 8.3 m/s2 when an unknown force is applied to it. What is the amount of the force? An object with a mass of 2000 g accelerates 8.3 m/s2 when an unknown force is applied to it. What is the amount of the forceThree blocks A, B, and C stand next to each other as shown in the figure. A force F with magnitude 140.5 N is applied to push block C directly and sends the blocks accelerating to the right. Let's assume there is no friction between the blocks and the ground. The mass of A, B, and C are 7.7, 58.7, and 99.7 kg, respectively. What is the force applied on block B by block C F (in unit of N)? B A