解析 Therefore the horizontal distance of the particle from O when it hits the ground is 165 m.gx2sec3a Using the equation of the path y = x tana- gives y=x-(gx^2)/(1600) We require the value of x when y =-2 So -2=x-(8x^2)/(1600) 49x^2-8000x-16000=0 中 x=165 ...
A particle is projected with speed 15 ms-' at an angle of 40 above the horizontal from a point on horizontal ground. Calculate the time taken for the particle to hit the ground. 相关知识点: 试题来源: 解析 1.930=(15sin40°)t-gt^2/2 t=1.93 ...
Give non-exact numerical answers correct to3significantfigures,or1decimal place in the case of angles in degrees,unless a different level of accuracy is specified in the question.Where a numerical value is necessary,take the acceleration due to gravity to be10m s−2.At the end of ...
A particle is projected from ground at some angle with the horizontal. Let P be the point at maximum height H. At what height above the point P should the particle be aimed to have equal to maximum height ? AH B2 H CH//2 D3 HSubmit Question 3 - Select One A ball A is projected...
At time t = 0, a particle of mass m is projected vertically upwards with speed U.The particle is subject to air resistance of magnitude, where v is the speed of the particle at time t and k is a positive constant.Show that the particle reaches its greatest height, H, above the point...
A 2-kg particle is projected from a table of height 3 m, with a speed 5 m/s. What is the mechanical energy of the particle as it drops down to the height 2 m. ()A..2 JB.33.8 JC.83.8 JD.44.6 J的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)
At time r = 0, a particle of mass m is projected vertically upwards with speed U.The partic subjectto arresistance of magnitude, where vi the speed of the particle attime r and k is a positive constant.Show thatthe particle reaches its greatest height, H, above the point of projection...
Please complete the following questions (1)A particle of mass 0.4 kg is projected vertically upwards with a speed of 20 ms^(-1). The particle experiences a resistance of 0.5v, where v is the velocity of the particle. ①Find the time taken for the particle to come to instantaneous rest....
7.A dZ uO Figure 4 A particle of mass m is attached to one end of a light rod of length l. The other end of the rod is attached to a fixed point O. The rod can turn freely in a vertical plane about a horizontal axis through O. The particle is projected with speed u from a...
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