Velocity = (speed) = 6((2 hati+2hatj -hatk))/(sqrt(4+4+1))=(4 hati+4 hatj-2 hatk) units.
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 ...
Using the kinetic theory of ideal gases, it can be shown that, if all the molecules are moving with speed v at right angles to one face of the box, the pressure p exerted on the face of the box is given by the expression pV = Nmv 2. (equation 1) This expression leads to the ...
4. A particle P of mass 2m is moving in a straight line with speed u on a smooth horizontal plane. The particle P collides directly with a particle Q, of mass m, which is moving on the plane along the same straight line as P but in the opposite direction to P. Immediately before...
1. A particle P of mass 2 kg is moving with velocity (3i+ 4j)m s' when it receives an impulse. Immediately after the impulse is applied, P has velocity (2i-3j)m s-'.(a) Find the magnitude of the impulse.(5)(b)Find the angle between the direction of the impulse and the ...
Consider a particle moving with constant speed such that its acceleration of constant magnitude is always perpendicular to its velocity.A.It is moving in a straight line.B.It is moving in a circle.C.It is moving in a parabola.D.It is moving in a hyperbol
5. A particle P is projected vertically upwards from a point A with speed a ms'. The point A is 17.5 m above horizontal ground. The particle P moves freely under gravity until it reaches the ground with speed 28 m s.(a)Show that =21(3)At time t seconds after projection, P is 19...
百度试题 结果1 题目A particle moves in a straight line. Its speed is inversely proportional to time. Its acceleration 相关知识点: 试题来源: 解析 proportional to speed 反馈 收藏
A particle is moving in the plane with position (, ) at time t. It is known that t and t. The position at time t=0 is x(0)=4 and y(0)=3.Find the speed of the particle at time t=2, and find the acceleration vector at time t=2. ...
A particle moves with uniform velocity. It meansThe particle is moving with constant speed. The particle moves along a straight line.