Mechanics | Relativity Answers

5. A 7650 kg helicopter accelerates upward at 0.80m/s2, while lifting a 1250 kg frame at
a construction site.

a) What is the lift force exerted by air on the helicopter rotors?
b) What is the tension in the cable (ignore its mass) that connects the frame to the
helicopter?
c) What force does the cable exert on the helicopter?

A force of 48.0 N is required to start a 6.0 Kg box moving across a horizontal
concrete floor.
a) What is the coefficient of static friction between box and floor?
b) If the 48.0 N force continues, the box accelerates at 0.70m/s2
, what is the
coefficient of kinetic friction?

A biker is heading in the positive y direction with initial velocity 9.0 m/s. Her acceleration is given by a=[4.1,-2] m/s2.

How far is the biker from the point she started at the instance she reaches the maximum in y coordinate?

A 0.5 kg ball is thrown upwards with an initial velocity of 6 m/s. How high will the ball reach before it starts falling again?

When the roller derby car reaches the bottom of the hill. How fast is it traveling (point C)? (using g = 10m/s/s and create an LOL to help solve the problem)

a 120n force applied horizontally drags a 4kg load along a horizontal table at a uniform velocity of 3m/s. What is the coefficient of kinetic friction between the load and the table

A horizontal force of 24 Newton acts on a body of mass 5 kg to move it's on a horizontal surface with acceleration of 3 m per second squared then the magnitude of the friction Force =

Two objects A and B having inertias Ma=m and Mb=1.1m are moving with velocities Va=V and Vb=8.4v.
Find the velocities of object B in the zero momentum frame of reference

Two objects A and B having inertias Ma=m and Mb=1.1m are moving with velocities Va=V and Vb=8.4v.
Find the velocities of object B in the zero momentum frame of reference

A car with a mass of 1565 kg initially at rest accelerates at a constant rate with a time interval of 9.2s reaches 12 m/s. It then collides with a stationary car with an elastic spring bumper.
What's the final kinetic energy of the system?