A 5.0 104 kg space probe is traveling at a speed of 11000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 4.5 105 N over a distance of 2600 km. What is the final speed of the probe?

Question

A 5.0  104 kg space probe is traveling at a speed of 11000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 4.5  105 N over a distance of 2600 km. What is the final speed of the probe?

Damon · Answer

calculate initial Kinetic energy Ke = (1/2) m v^2 Joules calculate work done by force W = 4.5 *10^5 * 2600 * 10^3 Joules New Ke = original Ke - W 1/2) m Vfinal^2 = New Ke

Brandon · Answer

I continue to plug in 1.855 x 10^12 as the answer into my online hw and it rejected the answer. Is that correct?