Mechanics | Relativity Answers

Two air track gliders experience an elastic head-on collision. A 0.28 kg glider is heading at 2.13 m/s when it collides with a 2.58 kg glider which is moving at -3.58 m/s.

What is the velocity of the 0.28 kg object after the collision?
What is the velocity of the 2.58 kg object after the collision?

A 0.45 kg sphere swings down from a height of 0.48 meters and elastically collides with a 0.74 kg block on a horizontal smooth surface as shown above. How far along the 30 degree incline (not vertical height) does the block slide before coming to rest?

A block of mass 2 kg is pulled up on a smooth incline making angle 30 degrees with horizontal . if block moves with an acceleration of 1 m/s2 , find
a) Power delivered by the pulling force at a time 4 sec after motion starts
b)average power deliverd after 4 sec the motion starts
***MY DOUBT
I am very weak in kinematics , so plz explain that the formula s=ut+1/2at^2 gives displament or distance. and if it gives displacement then it will only give the length of base of the incline and not d length of hypotenuse which if needed?

a particle of mass m and carrying charge -q1 starts moving around q2 along a circular path of radius r. what is period of revolution?

An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 950 m, horizontal distance 19.1 km, and 13.0° south of west. The second aircraft is at altitude 1050 m, horizontal distance 17.0 km, and 27.0° west of south.

(a) What the displacement vector FROM the first plane TO the second plane, letting i hat bold represent east, j hat bold north, and k hat bold up?

(b) How far apart are the two planes?

Given the kinematics equation for the motion of an object falling from rest, x=.5g*t2), what kind of relationship is predicted between x and t? (select all that apply)

1) x=k*t, where k is a constant

2) x=k*t2, where k is a constant.

3) displacement, x, is proportional to time, t.

4) diplacement, x, is proportional to the square of the time, t2.

5) displacement, x, has a linear relationship with time, t.

6) displacement, x, and time, t, obey a power law.

7) x=k*t+b, where k and b are constants.

a body changes its velocity from 5m/sec during an accelerated motion of 1m/sec square magnitude and covers a distance of 12 metres in some time.find the velocity at the end of this time?

the velocity of a boat is 2o km/h in a direction 50 degree north of east. the wind velocity is 5 km/h from the west. the resultant velocity of the boat can be represented by the side of a triangle in which two velocities are the other side. determine the resultant velocity of the boat

Is Pressure vector quantity or scalar quantity? Justify your answer?

The Space Shuttle travels at a speed of about 8.29 x 103 m/s. The blink of an astronaut's eye lasts about 104 ms. How many football fields (length = 91.4 m) does the Space Shuttle cover in the blink of an eye?