Mechanics | Relativity Answers

The cheetah can maintain its maximum speed
for only 7.5 s.
What is the minimum distance the gazelle
must be ahead of the cheetah to have a chance
of escape? (After 7.5 s the speed of cheetah is
less than that of the gazelle.)
Answer in units of m.

A jet airliner moving initially at 521 mph
(with respect to the ground) to the east moves
into a region where the wind is blowing at
434 mph in a direction 22◦
north of east.
What is the new speed of the aircraft with
respect to the ground?
Answer in units of mph.

A car travels 40 kilometers at an average speed of 80 kilometers per hour and then travels 40 kilometers at an average speed of 40 kilometers per hour. The average speed of the car for this 80-kilometer trip is?

Describe the equation mx + cx + kx = 0?. And does this equation has any implications on the wave motion?.

What initial velocity would be necessary for a projectile to be launched off a 50m high cliff so that it would produce a range of 473.67m and have a total time aloft of 8.04s. (g= 10N/kg)

Herbert and Randy is playing a friendly game of Serengeti Squash ball (which is basically football but with catchier name) with his antelope friends Thomas, Fred and Darius. On one play Herbert is tackled simultaneously by all three of his long-horned friends, experiencing the following forces:
Thomas: 600N, E 25 degrees S
Fred: 550N, W 40 degrees S
Darius: 610 N, W 37 degrees N

Find the net force on Herbert.

A ship launched from a dry-dock slides into the water at a constant velocity. Suppose the force of gravity that pulls the ship downward along the dry-dock is 4.26 X 10’7 N. If the coefficient of kinetic friction between the ships hull and the dry dock is 0.25, what is the magnitude of the normal force hat the dry dock exerts on the ship’s hull?

A 10kg stone is suspended with a rope of breaking strength 30kg-wt. The minimum time in which the stone can be raised through a height of 10m is

You are given a vector in the xy plane that has a magnitude of 81.0 units and a y component of -69.0 units.

At liftoff, a space shuttle with 2.0 x 10^6 kg total mass undergoes an upward acceleration of 0.60g.How do I calculate the force that the seat exerts on a 60 kg astronaut during liftoff?