Question

3. An object travelling at a speed of 40 m/s starts to accelerate uniformly with acceleration 5 m/s2. What would be the speed of the object 2 seconds later?

Answer 1

you can use one of the equations of uniform acceleration

u = 40, t = 2 , a = 5, v = ?

v = u + at
v = 40 + 5*2

Answer 2

what does u means?

Answer 3

u = initial velocity

the formula can also be written as

v(t) = v(0) + at

v (0) = velocity at time 0
and v(t) is vel. at time t

Answer 4

- thats the better way i think

the 'u' formula is whats taught in the UK

Answer 5

to know the final velocity of an object after time 2 sec formula is
final velocity(v)=initial velocity(u)+uniform accelration(a)*time of travelling(t)
so v=u+a*t
v=40+5*2
v=40+10
v=50

Answer 6

1. A train is travelling with a constant acceleration of 0 m/s2. At time t = 0 s, it is travelling at a speed of 15 m/s. What is the distance travelled by the train from time t = 0 s to t = 3 s?

Answer 7

for this ques how do I find the distance?

Answer 8

distance(s)=initial velocity(u)*time(t)+0.5 *accelaration(a) *t *t
s=15 *3+0 .5 *0 *3 *3
s=15 *3
s=45

Answer 9

okay! thanks alot:)

Answer 10

yw

Answer 11

its ok yar

Answer 12

giv me a medal yar for my help jojoonggg