Mechanics | Relativity Answers

a river is flowing from west to east with a speed of 5 m/s.a man can swim in still water with a velocity 10 m/min.in which direction should the man swim so as to take the shortest possible path to go the south

A 1 kg object is moving with a velocity of 6 m/s to the right. It collides and sticks to a 2 kg object moving with a velocity of 3 m/s in the same direction. How much kinetic energy is lost in the collision

a siren emitting a note of frequency n is fitted on a police van, traveling towards a stationary listener. What is the velocity of the van, if the frequency of the note heard by the listener is double the original frequency?
a) Vs = V
b) Vs=V/2
c) Vs = 2V
d) Vs=V/3

A satellite with a mass of 2273 kg is at an altitude of 42873 km above the surface of Saturn what is the strength of the gravitational force on the satellite

4 A bead of mass m is located on a parabolic wire with its axis vertical and vertex directed towards downward as in figure and whose equation
is x² = ay. If the coefficient of friction is µ, the highest distance above
the x-axis at which the particle will be in equilibrium is
(a) µa (b) µ²a (c)1/4 µ^2 g (d)1/2µ^ g

A man suspends a fish from the spring balance held in his hand and the balance reads 9.8N.
While shifting the balance to his other hand, the balance slips and falls down. What will be
the reading of the balance during the fall?

Given the following concurrent forces; 150 lbs at 30o above the OX axis, 100 lbs at 315o from OX, and 50 lbs at -45o from OX. Find the magnitude and direction of the resultant.

Find the resultant of three coplanar concurrent forces; F1 acting north and of magnitude 8 grams, F2 of magnitude 12 grams and acting southwest, F3 of magnitude 5 grams and acting southeast. Find the components of the resultant in an easterly and northerly direction.

The resultant of two forces of 628 grams and 532 grams is a force of 718 grams. Find the angle which the resultant makes with the forces.

A 30-lb body is suspended by two cords, one making 53o with the vertical and the other making 30o with the horizontal. What are the tensions in the cord?