What is 6% clay 64% sand 30% silt?

Keneila is attempting to ski down a 20 m high friction free hill for the first time. she has a speed 10 m/s at the top. what is her kinetic energy when she is a the bottom, 20 m ? (a)2500 j (b)9800 j (c)12300 j (d)3100j (e)15000j

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

See the attachment and solve question 5th