An electric motor and a single-fixed pulley work together to lift a 500 kg crate 50.0 m. how much work was done?

a) 10 j
b) 30,000 j
c) 3,000 j
d) 200,000 j

The work done is 245000 J.  

Explanation:  

The formula for the force due to the weight of the object is as follows;

Here, m is the mass of the object and g is the acceleration due to gravity.

Put m=500 kg and g=9.8 meter per second.

The formula for the work done is as follows;

Here, F is the force and s is the displacement.

Put F=4900 N and s=50.0 m.

Therefore, the work done is 245000 J.

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.