Question 1

If a 5.5 kg  cart is pushed in such a way that the net force on it is 60 N. Calculate the magnitude of its acceleration

Accepted Answer

$10.9ms^{-2}$

Answer

$11.9ms^{-2}$

Answer

$8.9ms^{-2}$

Answer

$9.9ms^{-2}$

Question 2

Find the magnitudes $F_{1}$ and $F_{2}$

Accepted Answer

$F_{1}=16.4N$ and $F_{2}=11.5N$

Answer

$F_{1}=17.4N$ and $F_{2}=12.5N$

Answer

$F_{1}=15.4N$ and $F_{2}=10.5N$

Answer

$F_{1}=18.4N$ and $F_{2}=9.5N$

Question 3

A large rocket has a mass of $2.5 ×10^{6}kg$  at takeoff, and its engines produce a thrust of $3×10^{7}N$. Assuming mass stays constant find the resultant force upwards on the rocket.

Accepted Answer

$5,500,000N$

Answer

$6,500,000N$

Answer

$7,500,000N$

Answer

$4,500,000N$

Question 4

Find the resultant force in the diagram shown

Accepted Answer

($0.2\hat{i}-7\hat{j}$)N

Answer

($0.6\hat{i}-9\hat{j}$)N

Answer

($0.4\hat{i}-8\hat{j}$)N

Answer

($0.8\hat{i}-10\hat{j}$)N

Question 5

What force does a trampoline apply to a 65 kg gymnast to accelerate her straight up at $8.5 ms^{-2}?$

Accepted Answer

1189.5N

Answer

1389.5N

Answer

1489.5N

Answer

1289.5N

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