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11:57 1 Take Quiz Exit Question 5 1 pts a mass Suppose you have Honda Civic that, along with passengers, 1,251 kg. How much force does it take to achieve the acceleration needed to reach 27 m/s (60 mph) in 6 s? Question 6 1 pts If you launch a toy rocket straight up with an initial velocity of 25.51 m/s, how high off the ground will it be after 2.71 s? Question 7 1 pts If you hit a golf ball and it takes off with a velocity of 48.15 m/s at an angle of 20.24 degrees above the horizontal, how far will it travel beforening une ground! 11:57 7 . Take Quiz Exit Question 1 1 pts If the acceleration a=1.667 m/s2 for a m=1.324 kg object, what is the net force applied to the object? Question 2 1 pts If a person has a mass of 71.77 kg on Earth where 8 = 9.81m/s2 what is their weight on the moon where g= 1.62m/s2 Question 3 1 pts 11:57 7 . Take Quiz Exit Question 7 1 pts If you hit a golf ball and it takes off with a veloci of 48.15 m/s at an angle of 20.24 degrees above the horizontal, how far will it travel before hitting the ground? Question 8 1 pts The time of flight for a projectile, i.e. how long it is in the air, is given by 20. ttof = sin e g What is the time of flight for a baseball that leaves the bat with a speed of 51.83 m/s at an angle of 41.89 degrees above the horizontal? 11:57 7 . Take Quiz Exit Question 9 1 pts Take the radius of the Earth to be 6,371 km. What is the orbital velocity of a satellite orbiting 373.1 km above the surface of the Earth? Note: you need to convert km to m. Question 10 1 pts Suppose you are on a small moon of mass 299.35×1012 kg which has a radius of 1,165.16 m. What is the escape velocity from the moon? Question 11 2 pts 11:57 1 . Take Quiz Exit Question 3 1 pts If you apply a force of 173.5 N to and object and it accelerates at 12.34 m/s?, what is its mass? Question 4 1 pts What is the velocity with which you throw a ball upwards if it makes it to a height of 4.118 m? Question 5 1 pts Suppose you have Honda Civic that, along with passengers, has a mass of 1,251 kg. How much force does it take to achieve the acceleration needed to reach 27 m/s (60 mph) in 6 s? 11:58 1 . Take Quiz Exit Projectile motion is the result of several dynamic factors working on the ball. These are it’s initial velocity in the horizontal direction (Vox), it’s initial velocity in the vertical direction (Voy), and the acceleration of gravity downward (g=9.81 m/s2). In the horizontal direction, we have x = Voxt In the vertical direction, the equation is y = Voyt 1 / 8 812 If we have an initial velocity vo at an angle o above the horizontal, then Vox = V, cos e , and Voy = 0, sin e The range (d) of a projectile, i.e. the distance it will travel from its starting point until it hits the ground is given by d = U2 sin(20). g 11:58 1 . Take Quiz Exit Formulas needed for these problems: Distance traveled: 1 -at? + vit + x, X = zar Velocity: v = at + v. Net force: F = ma. Weight: W = mg. Vertical motion in a gravitational field: 1 -gt- + vit + yo y = -381 Vertical velocity in a gravitational field: U = -gt + Vo: Projectile motion is the result of several dynamic factors working on the ball. These are it’s initial velocity in the horizontal direction (Vox), it’s initial velocity in the vertical direction (Voy), and the acceleration of gravity downward (g=9.81 m/s2). In the horizontal direction, we have x = Voxt 11:58 1 . Take Quiz Exit The range (d) of a projectile, i.e. the distance it will travel from its starting point until it hits the ground is given by d = v? -sin(20). 8 Orbital velocity is the velocity needed to keep an object in orbit around a planet like the Earth or star like the Sun. The equation for orbital velocity is pretty simple. It is Vorb = GM r The constant G is the universal gravitational constant and it has the value N · m2 G = 6.67 x 10-11 kg2 The mass M is the mass of the planet or star you are orbiting. For the Earth and Sun these are Me = 5.97 x 1024 kg and M. = 1.99 % 1030 kg resnectively 11:57 7 . Take Quiz Exit 1,165.16 m. What is the escape velocity from the moon? Question 11 2 pts Upload the Excel file in which you worked these problems. 1 pt: label everything correctly 1 pt: use Excel to perform the calculations. Upload Choose a File Quiz saved at 11:57am Submit Quiz Time Flanced. Hide 11:58 1 Take Quiz Exit The constant G is the universal gravitational constant and it has the value N · m2 G = 6.67 x 10-11 kg2 The mass M is the mass of the planet or star you are orbiting. For the Earth and Sun these are Me = = 5.97 x 1024 kg and M. = 1.99 x 1030; ºkg respectively. The distance r is this equation the distance from the center of the planet or star to the object in orbit. Escape velocity looks very similar to orbital velocity in terms of the equations. The escape velocity is the velocity you need to obtain in order to escape the gravitational well of a planet or star. It is given by 2GM Vesc = r Here, G, M, and r all mean the same thing they do above.

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