Mechanics | Relativity Answers

A PERSON TRAVELS ON A STRAIGHT ROAD OF 4 KM.THEN HE RETURNS BACK TO C ,WITH 2 KM.FIND THE DISTANCE AND MAGNITUDE OF DISPLACEMENT?

During the first step of a sprint race a sprinter of mass 64kg generates a horizontal braking impulse of -3.2 Ns and a horizontal propulsive impulse of +56.0 Ns.
What is the net horizontal mechanical work done by the sprinter in the first step?

two bodies of mass 3kg and 4 kg respectively are acted upon by 10N of force.what is the change in momentum if force acts for 2 seconds?

A jet aircraft is aimed south and travelling 851km/h. A wind blows the plane from 40 degrees N of E at 36km/h. What is the plane's resultant velocity?

A jet aircraft is aimed south and travelling 851km/h. A wind blows the plane from 40 degrees N of E at 36km/h. What is the plane's resultant velocity?

A sphere of radius 'R' is rolling with angular velocity 'w'. Find 'w' so that it can just climb the step of height 'h'.

When i look at the tv I can see the chandelier that hangs in front of the tv through the tv, is this reflection, if not then what phenomenon is this? Like when I look at the tv I can see myself in it.

a car moving with a velocity pf 36 km/h-1 is brought to rest in s5 seconds,calculate its decleration?

1)A train travels at a speed of 60km/h for 0.52hours at 30km/h for the next 0.24 and then at 70km/h for the next 0.71hours.calculate average speed for the entire train journey?

2)A train travels a distance of 15km at a uniform speed of 30km/h, the next 75km at a uniform speed of 50km/h and the last 10km at a uniform speed of 20km/h.calculate average speed for the entire train journey?

a resevoir contains mercury up to a hieght of h=10cm.the atmospheric pressure at the surface of the mercury is equivalent to a pressure made by a column of mercury of hieght H=75cm.calculate in Pa the total pressure exerted at a point in the bottom of the resevoir.take g=10N/Kg and density of mercury P=13600kg/mcubed