Mechanics | Relativity Answers

A force of 9.0N is applied to a body at rest on a smooth horizontal surface. If the body has a mass of 18.0kg and it moves in the direction of the force,find the work done in the first four seconds and the fourth second

b) For gravity waves

v p = C λ^1/2
Obtain the relation between vp and gp .

What should I do to find the gradient of a force vs extension graph? Should I use my best fit line?

A 2000 kg truck travelling at 54km/hr on the application of break it comes to rest by covering 37.5 metres.calculate average retarding force of break

Two equal mass object experience a totally inelastic elastic collision. Mass 1 has an initial velocity of 10 m/s in the negative y-direction. Mass 2 has an initial velocity of 10 m/s in the positive x-direction. The collision occurs at the origin. What is the magnitude and direction of the velocity of the combined mass?

Calculate the area of a triangle whose vertices are given by (3,-1,2),(1,-1,2),(4,-2,1)

A man carries a load of 50 kg to a height of 15m in 5 minutes. Calculate A) the work done, B)the power extended

Our body can survive an acceleration magnitude less than 250 m/s2 for the case of a sudden stop during a car accidents etc. Even though the maximum speed limit is 80 km/h notoriously overtaking another car, you are involved in an accident with the initial speed of 105 km/h. Over what distance must the airbag inflating from the dashboard stop you so that you survive the crash?

The space shuttle endeavor has a mass of 2.0x10^6 kg as it sit on the launching pad at cape canaveral The rocket engines have a combined thrust of 3.0x10^7 at take off.

A)What is the weight of the rocket on the launch pad?
B)What is the acceleration of the Endeavor as it takes off?
C)The average acceleration of the Endeavor during it's 10 minute launch is 13m/s^2. What is the final velocity during this time period?
D)As the shuttle flies higher and higher, would you expect the acceleration to decrease, stay the same, or increase? The thrust from the engines remains the same during the flight. Explain!

a 42km/hr wind blows in the direction 35 degrees south of west, while a helicopter headed toward 55 degrees north of west at 152 km/hr relative to the air. What is the resultant velocity of the helicopter?