Question

Answer this please fast

Answer 1

Answer:

1. 0 km/h
2. 35 km/h
3. After 10 hours the graph shows zero acceleration.
4. Between 3 and 8 hours the graph shows varying retardation.
5. d = S × t

= 35 × 8

d = 280 km/h is the answer.

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Answer 2

Answer:

Explanation:(i) : initial speed 10km/h

(ii): 35km/h

(iii): BC as velocity is constant that means there was no acceleration

(iv) : CD as velocity is decreasing with time that means there is retardation nd as the slope is not straight that means the retardation is varying.

(v) distance = speed × time

= area of trapezium

EABF. + area of

rectangle FBCD

=1/2×(10+35)×3. + 5×35

= 135/2+ 175

=67.5+175

=242.5km