What is the speed of the particle when t=2.3? () A. 1.000 B. 2.014 C. 3.413 D. 11.652 相关知识点: 试题来源: 解析C(A) This option is correct. This is the magnitude of the position vector rather than the velocity vector: √ ((x(2.3))^2+(y(2.3))^2)=1000....
For t≥q 0, a particle moving in the xy-plane has the position vector (x(t),y(t)) at time t, where t and t. At time t=2, the position of the particle is (5,7). Find the acceleration vector of the particle at time t=2. 相关知识点: 试题来源: 解析 (-1.033,3.027) ...
The position vector of a particle moving in the xy-plane is (x(t), y(t)) with t≥q 0, x(t)=3t^2+4 and y(t)=cos (2t-4).Write an equation of the line tangent to the path of the particle at t=2. 相关知识点: 试题来源: 解析 y=1 At t=2 the position vector is (16...
A particle moves in a horizontal plane under the action of a single force, F newtons. The unit vectors i and j are directed east and north respectively. At time t\ seconds, the position vector, r\ metres, of the particle is given by r=(t^3-3t^2+4) i+(4t+t^2) j(a) Find ...
A particle moves in the plane such that at time t≥q 0, it has coordinates (x,y)The rate of change of x equals the difference in the x- and y-coordinates minus three times the elapsed time.The rate of change of y equals the height of the particle above the line y=4x+3The ...
Question: A particle moves in the xy-plane with position given by (x(t),y(t))=(5-2t,t2-3) at time t. In which direction is the particle moving as it passes through the point (3,-2) ?(A) Up and to the left(B) ...
A particle moves on a plane such that its position at time t s is given byr=(3t-2)i+(4t-2t^2)j ma Write expressions for the velocity and acceleration of the particle at time t.b Work out the initial speed of the particle.c At what time (s) is the particle moving parallel to...
a particle moving on the plane, the equation of motion is XOY 。The equation of motion is x=3t+5, y=1/2t2+3t-4(SI)(1) The position vectors at time t = 1s and time t = 2s are obtained, and the position shifts of these prime points in 1 second are calculated; (2) Calculate...
If a particle moves in the zyplane,its angular momentum vector is in the (1).x direction.( (②).y direction. (3).z direction. (4).z-y plane. A.(1)B.(4)C.(2)D.(3)的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答
At time t, 0≤q t≤q 2π, the position of a particle moving along a path in the xy-plane