Mechanics | Relativity Answers

Calculate distance travel

A body of a 6kg undergoes a Constant horizontal acceleration of 2 m² 2. Calculate the resultant horizontal force acting on the body. what will be the resultant force on the body when it moves with a uniform velocity of 5m/s?.

A 1450 kg airplane is flying through the air.  There are four forces acting on it: An engine force of 6.55 x 104 N Forward, a drag force (from air) of 1.2 x 104 N Backwards, a lift force of 1.62 x 104 N Up and gravity.

a.Draw a FBD for the plane and determine the net force on the plane.

b. What is the acceleration of the plane?

The maximum applied force that can be applied to an 8.0 kg steel slider before it starts moving along a horizontal steel rail is 31 N [forward]. What is the coefficient of static friction?

Projectile A is dropped from 50 meter building. Projectile B is dropped from another building and takes 2.43 seconds to impact the ground. Upon impact, determine how much faster the right projectile was moving than the slower projectile.

A man is riding a vehicle towards a vertical cliff with a velocity of 36 km/h. He fires a gunshot and hears its echo after 4 sec. The speed of sound in air is 320 m/s.

(i) The distance between the cliff and the position, where he shot the gun is:

A.640 m

B.680 m

C.620 m

D.660 m

What is the force required for a steel wire to double it's length when it's area of cross section is one spuare cm. And Young's modules is 200Gpa.

As the length of the wire is doubled the change in length is equal to it's original length.

2.00-kg frictionless block is attached to an ideal spring with force constant 315 N/m. Initially the spring is neither stretched nor compressed, but the block is moving in the negative direction at 12.0 m/s. Find (a) the amplitude of the motion, (b) the block's maximum acceleration, and (c) the maximum force the spring exerts on the block.