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accelerates uniformly at 2.0 ms2 for 10.0s. Calculate its final velocity​

Sagot :

Answer:

The distance is

=

7

m

Explanation:

Apply the equation of motion

s

(

t

)

=

u

t

+

1

2

a

t

2

The initial velocity is

u

=

0

m

s

1

The acceleration is

a

=

2

m

s

2

Therefore, when

t

=

3

s

, we get

s

(

3

)

=

0

+

1

2

2

3

2

=

9

m

and when

t

=

4

s

s

(

4

)

=

0

+

1

2

2

4

2

=

16

m

Therefore,

The distance travelled in the fourth second is

d

=

s

(

4

)

s

(

3

)

=

16

9

=

7

m