Mechanics | Relativity Answers

Convert 23s into ms

2) A man walks 10 km towards west and then 15 km towards south. Find the resultant vectors, magnitude and direction.

a person crosses a bridge of 600metres in 5 minutes what is his speed in kmph?

Vectors A and B have scalar product -6.00 and their vector product has magnitude 9.00.What is the angle between these two vectors?

Two vectors A and B have magnitude A = 2.96 and B = 3.08. Their vector product is A×B = -4.90k + 2.00i . What is the angle between and A and B?

Two ropes in a vertical plane exert equal magnitude forces on a hanging weight but pull with an angle of 86.0 between them.What pull does each one exert if their resultant pull is 372 directly upward?

If a ball is dropped what is the initial speed and acceleration? Please explain.

The potential energy U(x)of a particle moving along x-axix is given by U(x)=ax-bx2. Find the equilibrium position of particle.

The position(x) of a body moving along x-axix at time (t) is given by x=3t2,where x is in metre and time t is in second.If mass of the body is 2kg ,then find the instantaneous power delivered to body by force acting on it at t=4sec.

To determine the volume of a cube, a student measured one of the dimesions of the cube several times. If the true dimension of the cube is 10.62 cm, give an example of 4 sets of measurements that would illustrate the following:
imprecise and inaccurate data;
precise but inaccurate data;
precise and accurate data;
give a possible explanation as to why data can be precise or inaccurate.
What is wrong with saying a set of measurements is imprecise but accurate?