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(a) The final speed of an object is 40% lower than its initial speed (ie, 40%...
a) The 82 kg Bogaraj left the ramp about 45 m lower than his starting position....
a) The 82 kg Bogaraj left the ramp about 45 m lower than his starting position. (That is the difference in elevation was 45m) If you ignore the slowing forces of kinetic friction and wind drag,what was his kinetic energy at that point? b) what was his speed at that point? c) If Bogataj has simply fallen straight down 45 m rather than skiing down a ramp, what would be his kinetic energy? d) After hitting the ground Bogataj crashed...
A students lab group has already agreed on the following two ideas: 1) When an object...
A students lab group has already agreed on the following two ideas: 1) When an object is at terminal velocity, the kinetic energy is constant. 2. The decrease in gravitational energy over a given distance is proportional to the number of filters. Which of the additional ideas below would most be helpful in deciding how the increase in thermal energy depends on the number of coffee filters? a) When an object is at terminal velocity, the increase in thermal energy...
Problem 36 bclow presents a model describing the drag of a fluid medium that is released from rest at time t 0 (same in...
Problem 36 bclow presents a model describing the drag of a fluid medium that is released from rest at time t 0 (same initial conditions). Using Newton's Second Law, you build a model of the form particle moving through a (governing equation (initial velocity) mi mg-F drag '0 (0)(0)a (t) is the particle's position, m is the mass of the particle, g is the acceleration due to gravity, and Fa is the magnitude of the drag force. You account for...
Centripetal Froce... A. Accelerates an object without changing its speed B. is center seeking C. is...
Centripetal Froce... A. Accelerates an object without changing its speed B. is center seeking C. is propotional to an object mass D. All of the above WHich statement is true of radians A. They are equivalent to a measurement of degrees B. It is the ratio of two lengths: the radius and the arc length C. 2 radians= 360 degrees D. All of the above In this expermient, for a given radius, the larger the measured rotational period... A. The...
5) An object is moving to the left at constant velocity. A constant force to the left is now applied to the object...
5) An object is moving to the left at constant velocity. A constant force to the left is now applied to the object. Which of the following is correct? A) The object continues to move to the left, and its speed increases. B) The object continues to move to the left with a constant speed. C) The object continues to move to the left, and its speed decreases. D) The object immediately stops and then begins moving to the right...
Learning Goal To understand how the trajectory of an object depends on its initial velocity, and...
Learning Goal To understand how the trajectory of an object depends on its initial velocity, and to understand how air resistance affects the trajectory. For this problem, use the PhET simulation Projectiie Motion. This simulation allows you to fire an object from a cannon, see its trajectory, and measure its height, range, and hang time (the amount of time in the air) 驵瘦. พี่ PHET Piojectile Motion Start the simulation by selecting the option labeled "Intro". Press the red Fire...
(b) It has one-half its initial velocity (d) It moves in the opposite direction. 30.In an...
(b) It has one-half its initial velocity (d) It moves in the opposite direction. 30.In an inelastic collision between two objects with unequal (a) does not change masses, (a)the total momentum of the system will incress. (b) the total momentum of the system will decrease. velocity 4 times of its initial velocity. In this proces the potential energy of the car (b) becomes twice to that of initial (e) becomes 4 times that of initial (d) becosnes 16 times that...
Done 6 of 17 25. Speed is the rate at which what happens? a. The rate...
Done 6 of 17 25. Speed is the rate at which what happens? a. The rate at which you pick your nose in class. Yes, I've seen you do it. b. The rate at which you run out of class when the bell rings for your next period. c. The rate at which your position changes. d. The rate at which your velocity changes. e. The rate at which your acceleration changes. 26. What is the meaning of free fall?...
1) An object is moving in a straight line so that its speed is doubling every...
1) An object is moving in a straight line so that its speed is
doubling every 5 seconds. The acceleration of the object (in
m/s2)is
A) 0.20 B)0.40 C)2.50 D) 5.00 E) constant, but it is none of the
values listed F) constant, but the value is not known without the
initial velocity G) changing
2)Multiple select
An object is launched at the initial velocity of v 0 =12 m/s up a Θ=...
An object is launched at the initial velocity of v 0 =12 m/s up a Θ= 20 degrees incline. The initial velocity is along the incline.The coefficient of kinetic friction is μ= 0.2 a) Draw a free body diagram and apply Newton’s Second Law. b) Find the acceleration of the object as it moves up the incline. Find an expression first, then plug in numerical values. c) Find the distance travelled up the incline.. Find an expression first, then plug...
Problem 36 bclow presents a model describing the drag of a fluid medium that is released from rest at time t 0 (same initial conditions). Using Newton's Second Law, you build a model of the form particle moving through a (governing equation (initial velocity) mi mg-F drag '0 (0)(0)a (t) is the particle's position, m is the mass of the particle, g is the acceleration due to gravity, and Fa is the magnitude of the drag force. You account for...
5) An object is moving to the left at constant velocity. A constant force to the left is now applied to the object. Which of the following is correct? A) The object continues to move to the left, and its speed increases. B) The object continues to move to the left with a constant speed. C) The object continues to move to the left, and its speed decreases. D) The object immediately stops and then begins moving to the right...
Learning Goal To understand how the trajectory of an object depends on its initial velocity, and to understand how air resistance affects the trajectory. For this problem, use the PhET simulation Projectiie Motion. This simulation allows you to fire an object from a cannon, see its trajectory, and measure its height, range, and hang time (the amount of time in the air) 驵瘦. พี่ PHET Piojectile Motion Start the simulation by selecting the option labeled "Intro". Press the red Fire...
(b) It has one-half its initial velocity (d) It moves in the opposite direction. 30.In an inelastic collision between two objects with unequal (a) does not change masses, (a)the total momentum of the system will incress. (b) the total momentum of the system will decrease. velocity 4 times of its initial velocity. In this proces the potential energy of the car (b) becomes twice to that of initial (e) becomes 4 times that of initial (d) becosnes 16 times that...
Done 6 of 17 25. Speed is the rate at which what happens? a. The rate at which you pick your nose in class. Yes, I've seen you do it. b. The rate at which you run out of class when the bell rings for your next period. c. The rate at which your position changes. d. The rate at which your velocity changes. e. The rate at which your acceleration changes. 26. What is the meaning of free fall?...
1) An object is moving in a straight line so that its speed is
doubling every 5 seconds. The acceleration of the object (in
m/s2)is
A) 0.20 B)0.40 C)2.50 D) 5.00 E) constant, but it is none of the
values listed F) constant, but the value is not known without the
initial velocity G) changing
2)Multiple select
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