According to the theory of plate tectonics, what drives the motion of the continents?

a. earths strong magnetic field
b. movie magma in the mantle
c. strong winds along the equator
d. volcanic islands in the ocean
e. changing ocean currents

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k