Question

A rocket sled is propelled by a solid propellant rocket motor of 6.278×105 N thrust. If the sled travels 1.719×103 m while attaining a top speed of 7.780×102 m/s. What is its average acceleration?

Answer 1

The average acceleration is 203 m/s^2 and the mass is 3202 Kg.

Explanation:

Given data:

F = 6.496×10^5 N

s = 1.788×10^3 m

u = 0 m/s

v = 8.52×10^2 m

Solution:

a) Average acceleration is given by -

a =v^2 / 2s

a = (8.52×10^2)^2 / (2×1.788×10^3)

a = 203 m/s^2

b) Mass of the rocket sled is given by-

m = F/a

m = 6.496×10^5 / 203

m = 3202 kg

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