What would be harder to accelerate- a 4kg shot put ball or a 2,000 kg boulder

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

What properties of a moving object are used in determining the object's energy of motion