1. a body of mass 40kg is given an acceleration of 10ms/2 on a horizontal ground for which the coefficient of friction 0.5, calculate the force required to accelerate the body (g= 10ms/2) 2. a force of 20N applied parallel to the surface of a horizontal table and just sufficient to make a block of mass 4kg move on the table. Calculate the coefficient of friction between the block and the tabla.

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

Which one of the following research methods can show cause and effect

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?