a-level物理问题- a vehicle moving with a uniform acceleration of 2m/s2(小标“2”) has a velocity of 4m/s at a certain time.What will its velocity be?questionA:1s later?B 5s later?
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a-level物理问题- a vehicle moving with a uniform acceleration of 2m/s2(小标“2”) has a velocity of 4m/s at a certain time.What will its velocity be?questionA:1s later?B 5s later?
a-level物理问题-
a vehicle moving with a uniform acceleration of 2m/s2(小标“2”) has a velocity of 4m/s at a certain time.What will its velocity be?
questionA:1s later?
B 5s later?
a-level物理问题- a vehicle moving with a uniform acceleration of 2m/s2(小标“2”) has a velocity of 4m/s at a certain time.What will its velocity be?questionA:1s later?B 5s later?
for question A:the answer is v=u+at
v=4+2*1=6 m/s
B:the answer is v=u+at
v=4+2*5=14 m/s
these is a simple questions for kinematics,you should pay attention to the formula for the uniform motion.
一艘小船以2m/s^2匀加速行驶，在某一时间达到4m/s的速度，问它的速度是多少？你是不是打错了！不是What will its velocity be？看了后面选项应该是问需要经过多少时间吧。并且这个题少条件，匀加速，那么初速度是多少呢？从静止开始运动还是从动太开始运动？总之题意不清，从答案推测，都有可能，一种正着开，一种反着开……先把题发清楚...
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一艘小船以2m/s^2匀加速行驶，在某一时间达到4m/s的速度，问它的速度是多少？你是不是打错了！不是What will its velocity be？看了后面选项应该是问需要经过多少时间吧。并且这个题少条件，匀加速，那么初速度是多少呢？从静止开始运动还是从动太开始运动？总之题意不清，从答案推测，都有可能，一种正着开，一种反着开……先把题发清楚
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不知道是不是我理解有问题
最后问题的意思应该是
一车以2米每二次方秒的匀加速运动,某时刻的速度是4米每秒,它的速度将会是多少.
给的选项怎么是时间呢?