aA particle moves with constant acceleration a. The expression v_{\rm i}+at represents the particle's velocity at what instant in time? 微粒移动以恒定的加速度a。 表示v_ {\ rm i} +at代表粒子速度在什么瞬时及时? [translate] ait was a pity that the great writer died for his works ...
【解析】if a particle moves along a curve withconstant speed thenA the magnitude of its acceleration must equa0答:错。质子沿曲线做匀速率运动,虽然是匀速率,但加速度是矢量vector,只要沿曲线运动,就一定有加速度,所以加速度不为0。B the direction of accleration must be constan答:错。做匀速率圆周运...
3)A particle moves in a straight line with an acceleration which s inverselyproportional to r3 where r is the time, measured in seconds If the particlehas a velocity of 3 ms"' when / = 1 and the velocity approaches a umitingvalue of 5 ms"', find an expression for the velocity at ...
Because the acceleration function is given, you must first take the antiderivative to get the velocity function. Once you have the velocity function, take another antiderivative to get the position function. Remember to add a constant "+C" whenever you take an antiderivative. Because a(t)=...
A particle moves along the x-axis in such a way that its acceleration at time t for t≥q 0 is given by a(t)=4cos (2t). At time t=0, the velocity of the particle is v(0)=1 and its position is x(0)=0.Write an equation for the velocity v(t) of the particle. 相关知识点...
A particle moves along the x-axis with its velocity at time t given by v(t)=bt^2-ct+8, where b and c are constants and b does not equal c. For which of the following values of t is the particle at constant velocity?( ) A. t= c(2b) B. t=2bc C. t= (2b)c D. t=2b...
AP 微积分 BCif a particle moves along a curve with constant speed thenA the magnitude of its acceleration must equal 0B the direction of accleration must be constantC the curve along which the particle moves must be a straight lineD its velocity a
A particle moves along the x-axis so that, at any time t≥ 0, its acceleration is given by a(t)=6t+6. At time t=0, the velocity of the particle is -9 and its position is -27.Find v(t), the velocity of the particle at any time t. 相关知识点: 试题来源: 解析 v(t)...
A particle moves along a straight line such that its acceleration, in m s-2, acts towards a fixedpoint O and is proportionalto its distance xm, from O.d2xgicnas(d^2x)/(dt^2)=-kx t≥0The equation of motion is given aswhere k is a constant.Given that the acceleration is-7ms^(-...
2 A particle P of mass mkg moves along a horizontal straight line with acceleration ams2 given by v(1-2t2)a=(v(1-2t^2))/t where vms is the velocity of P at time ts.(a)Find an expression for v in terms of t and an arbitrary constant.[3](b) Given that a = 5 when t=1...