题目【题目】 A particle moves in the xy plane such that its position vector at time / is given by r = (31-1)l+ (4+-1)j. Find vector expressions for the velocity and acceleration of the particle at time r and when /-2. 相关知识点: 试题来源: 解析 【解析】 a = 6i+48j ...
A particle moves in a straight line so that its position x cm from a fixed point O at time ts (t ≥ 0) is given by x = -t3 + 7t2 - 14t +6. The particle's acceleration at t = 3 is A -4 cm/s2 B 3 cm/s2 C 4 cm/s2 D 8 cm/s2 E 0 cm/s2 相关知识点: 试题来...
The position of a particle moving along x-axis varies eith time t as x=4t−t2+1. Find the time interval(s) during which the particle is moving along positive x-direction. View Solution Knowledge Check A particle moves along x-axis such that its position veries with time as x=50t−...
A particle starts motion from rest and moves along a straight line. Its acceleration-time graph is shown. Find out speed of particle at t=2s and at t=3s. View Solution A particle starts motion from rest and moves along a straight line. Its acceleration-time graph is shown. Find out ...
Answer to: A particle moves on the x-axis so that at any time t, 0\leq t \leq 1, its position is given by By signing up, you'll get thousands of...
A particle moves on the x-axis so that its position at any time t≥q 0 is given byx(t)=2te^(-t).Find the velocity of the particle when its acceleration is 0. 相关知识点: 试题来源: 解析 -0.271 x''(t)=-2e^(-t)(2-t)=0t=2x'(2)=v(2)=2e^(-2)(1-2)= (-2)(e^...
8 A particle moves in the x-y plane so that its position at time ts is given b yx=t^3-8t , y=t^2for-3.51 3.5. The units of distance are metres. The graph shows the path of the particle and the direction of travel at the point P (8, 4).y P0(a) Find in terms of t....
A particle moves along the x-axis in such a way that its x-co-ordinate varies with time asx=2–5t+6t2. The initial velocity and acceleration of particle will respectively be- View Solution View Solution View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions...
A particle moves along the X-axis as x=u(t−2s)+a(t−2s)2. View Solution A particle moves along x-axis such that its position veries with time as x=50t−5t2. Select the correct alternative (s). View Solution A particle moves along x - axis in such a way that its x - ...
Answer to: The position of a particle moving along the x-axis is given by s(t)=4t^{2}+6. Use difference quotients to find the velocity v(t) and...