问题描述:
1.what is the correct formula manipulation to find acceleration when using the equation Vf平方=Vi平方+2ad (Vf就是最终速度,Vi是初始速度,a表示加速度,d表示距离)
A(Vf平方-Vi平方)/d B (Vf+Vi)的平方/2d
C (Vf平方+Vi平方)/2d D (Vf平方-Vi平方)/2d
2.the graph shows the motion of a farmer's truck.what is the truck's total displacement?assume that north is the positive direction.
A 150m south B 300m north
C 125m north D 600m south
3、How can the instantaneous acceleration of an objevt with varying acceleration be calculated?
A by calculating the slope pf the tangent on a distance-time graph
B by calculating thearea under the graph on a distance-time graph
D by calculating thearea under the graph on a velocity-time graph
C by calculating the slope pf the tangent on a velocity-time graph
A(Vf平方-Vi平方)/d B (Vf+Vi)的平方/2d
C (Vf平方+Vi平方)/2d D (Vf平方-Vi平方)/2d
2.the graph shows the motion of a farmer's truck.what is the truck's total displacement?assume that north is the positive direction.
A 150m south B 300m north
C 125m north D 600m south
3、How can the instantaneous acceleration of an objevt with varying acceleration be calculated?
A by calculating the slope pf the tangent on a distance-time graph
B by calculating thearea under the graph on a distance-time graph
D by calculating thearea under the graph on a velocity-time graph
C by calculating the slope pf the tangent on a velocity-time graph
问题解答:
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