Mechanics | Relativity Answers

A 500-N tightrope walker stands at the center of the rope. If the rope can withstand a tension of 1 800 N without breaking, what is the minimum angle the rope can make with the horizontal?

Two forces act on a point objects as follows :100N at 170° and 100N at 50°.find their resultant

Two forces act on a point object as follows 100N at 170°and 100N at 50°.find their resultant

A jet airliner moving initially at 689 mph
(with respect to the ground) to the east moves
into a region where the wind is blowing at
424 mph in a direction 59◦
north of east.
What is the new speed of the aircraft with
respect to the ground?
Answer in units of mph.

To win the game, a place kicker must kick a
football from a point 28 m (30.6208 yd) from
the goal, and the ball must clear the crossbar,
which is 3.05 m high. When kicked, the ball
leaves the ground with a speed of 18 m/s at
an angle of 49.4◦from the horizontal.The acceleration of gravity is 9.8 m/s2.
By how much vertical distance does the ball
clear the crossbar?
Answer in units of m.

Two airplanes leave an airport at the same
time. The velocity of the first airplane is
730 m/h at a heading of 44.3◦. The velocity
of the second is 590 m/h at a heading of 83◦.
How far apart are they after 2.9 h?
Answer in units of m.

m=68kg
v=4km/h
n=?

What provides the centripetal force for a car driving on a flat circular track?

1)the steering wheel
2)friction between tyres and track
3)the driver
4)the inertia of the car

When a car makes a sharp left turn, what causes the passengers to move toward the right side of the car?


centripetal acceleration
centripetal force
centrifugal force
inertia

What is the term for the net force directed toward the centre of an object’s circular path?


circular force
centrifugal force
centripetal force
orbital force