20.)using a ramp with a mechanical advantage if you needed to move a 200 n load a distance of .5 meters what would be the input distance (pushed up the ramp)
A.) .25m B.) .5m C.)1 m D.) 2 m E.) 4
21.) an object is stationary with mass 10 kg and is 8 meters above ground assuiming there is no air resistance of friction what is the objects kinetic energy.
a.) 7840 j B.) 800 j C.) 784 j D.) 892 j D.) 0 j
22.) a plane is travelling 30 m/s along the positive y-axis. awind at 30 degrees to the x-axis going 20 m.s pushes the plane along a new path. what is the planes velocity in the x direction.
A.) 20.2 m/s B. 17.3 C.) 10 ms D.) 25.9
24.) an object is in free fall (v initial= 0) how fast is it going after five seconds?
a.) 12.5 ms b.) 24.5 ms C.) 49 ms D.) 122.5
15.) an object with mass 15 kg has a kinetic energy of 1739 joules. what is the object’s velocity?
A.) 177.4 ms
B.) 4.8 ms
c.) 11.8 ms
d.) 2.7 ms