College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- A space of mass 120 kg is going to use a planet for a gravitational assist- that is, use the planet's gravity to change its direction of travel without expending any fuel. It is initially moving at a velocity of 280 m/s and at an angle of theta initial = 53 degrees, at a distance of 11500 km from the center of the planet. Given an expression for the angular momentum of the spacecraft using the coordinate system specified in terms of m, r0, v0, theta initial, and vector units i, j, k If the spaceship whips around the planet to the other side so that the angle is theta 35 and is moving at 95 m/s, how far, in kilometers, from the planet is it?arrow_forwardA particle of mass m is dropped from rest near the Earth’s surface at time t = 0. Relative to an x-y coordinate system, where upward is the positive y direction and the x axis is horizontal, the initial position of the particle is (-d, 0). Neglect air resistance. Part (a) Write an expression for the magnitude of the angular momentum of the particle about the origin as it falls. Your expression will be in terms of m, d, t, and g (the acceleration due to gravity). Part (b) Write an expression for magnitude of the the torque on the particle about the origin as it falls. Your expression will be in terms of m, d, and g (the acceleration due to gravity). Part (c) Write an expression for the magnitude of the rate of change of the angular momentum of the particle as it falls. Your expression will be in terms of m, d, and g (the acceleration due to gravity).arrow_forwardTwo particles of mass m, = 2.06 kg and m, = 5.02 kg are joined by a uniform massless rod of length { = 1.80 m (see figure below). The system rotates in the xy plane about an axis through the midpoint of the rod in such a way that the particles are moving with a speed of 3.05 m/s. What is the angular momentum of the system? magnitude direction ]kg • m²/s |---Select-- Varrow_forward
- A 1.91 kg particle-like object moves in a plane with velocity components vx = 78.6 m/s and vy = 91.3 m/s as it passes through the point with (x, y) coordinates of (1.15, -2.20) m. Just then, in unit-vector notation, what is its angular momentum relative to (a) the origin and (b) the point (-1.20, -1.20) m?arrow_forwardIn (Figure 1), take m₁ = 3 kg and m³ = 5 kg. Figure 5m 8 m/s 4m 3 1.5 m O 0 2 m 4 m mB B 30° 1 m 6 m/s x < 1 of 1 Part A Determine the z component of the angular momentum Hp of particle A about point P using scalar notation. Express your answer to three significant figures and include the appropriate units. (Hp)₂ = Submit Part B μA Submit Value Provide Feedback Request Answer Determine the z component of the angular momentum Hp of particle B about point P using scalar notation. Express your answer to three significant figures and include the appropriate units. (HP)₂= Value HÅ Units Request Answer wwwwww ? Units ?arrow_forwardAn object with mass=1.0kg is projected vertically up with speed vo=10 m/s from a point with coordinates (0,2,3) in meters. What is the change in the angular momentum (relative to the origin) for the entire flight if the object lands at the original point.arrow_forward
- Two particles, each of mass 3.21 × 10-4 kg and speed 6.81 m/s, travel in opposite directions along parallel lines separated by 5.49 cm. (a) What is the magnitude L of the angular momentum of the two-particle system around a point midway between the two lines? (b) Is the value different for a different location of the point? If the direction of either particle is reversed, what are the answers for (c) part (a) and (d) part (b)? (a) Number 0.000120 Units kg-m^2/s (Ь) yes (c) Number Units kg-m^2/s (d) yesarrow_forwardA 1.10-kg particle moves in the xy plane with a velocity of v = (4.30 î –- 3.50 ĵ) m/s. Determine the angular momentum of the particle about the origin when its position vector is ŕ = (1.5o î + 2.20 ĵ) m. (0 î + 0 j + 13.85 Review the equation for the angular momentum in terms of components of the vectors. k) kg · mʻ/sarrow_forwardA diver (m = 60 kg) jumps from a diving board. At takeoff, his angular momentum about the transverse axis is 30 kg⋅m2/s. His radius of gyration about the transverse axis is 0.5 m at this instant. During the dive, he tucks and reduces his radius of gyrations about the transverse axis to 0.2 m. At takeoff, what is the diver’s moment of inertia about his transverse axis?arrow_forward
- Each of the following objects has a radius of 0.162 m and a mass of 2.31 kg, and each rotates about an axis through its center (as in this table) with an angular speed of 38.4 rad/s. Find the magnitude of the angular momentum of each object. (a) a hoop kg · m²/s (b) a solid cylinder kg · m²/s (c) a solid sphere kg · m²/s (d) a hollow spherical shell kg · m²/sarrow_forwardPlease help mearrow_forwardA 1.70-kg particle moves in the xy plane with a velocity of = (4.10 1-4.00 j) m/s. Determine the angular momentum of the particle about the origin when its position vector is F (1.50 +2.20 j) m. + j+ k) kg - m²/sarrow_forward
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