Mechanics | Relativity Answers

An elephant pulls the wooden lump of mass 0.5 ton by a rooe along the ground where the rope makes an angle 60° to the horizontal at uniform velocity. Given that the frictional force between the lump and the ground is 200 N, find: 1. the tension force in the rope.
2. the tension force in the rope required to make the lump move at acceleration 2 m/s2

If you run on a winding path from point A to point B and travel a distance of 240m in 20sec then your average speed is

Q1.A perfectly balanced weight and platform are supported by a steady water jet as shown in the figure below. If the total weight supported is 900 N, determine the jet velocity. Diameter of the water jet is 5 cm.

Please help me

a 1000 kg truck is parked on a bridge 100 m long at a distance of 25 m from one end of the bridge. the mass of the bridge is 200 kg m. calculate the reaction forces at the supports at the two ends of the bridge. (take g 10 ms )

A body is rolling of mass m and radius r is rolling without slipping on a smooth horizontal surface towards smooth vertical wall. The body collides elastically with the wall and it is observed that about point in return journey , the angular momentum about a point is zero after the collision. The body can be? Briefly explain this concept please
(A) Hollow Sphere. (b) Hollow cylinder
(C) Solid Sphere (d) solid cylinder

If Tommy is traveling 20 miles per south for 2 hours. How far is he displaced?

A steel bar 1.5m long is used to lift a stack of plates. If the fulcrum is 5 cm from the end of the bar and a force of 500 N is used, calculate A) the MA, B)the resistance force.

A screw jack has a pitch of 1/2" and is turned with a bar 4' long. Calculate A) the MA, B) the load that can be lifted (theoretically) with a force of 50 lbs, C) the efficiency of the machine if a load of 10,000 lbs is lifted

The attacking ship has manoeuvred to 2500 m distance away from the mountain peak (1800 m high) and can shoot projectiles with an initial speed of 250 m/s. The shoreline on the right side of the mountain is horizontally 300 m away from its peak. Then the attacking ship has manoeuvred to take a new position to be at 2250 m away from the mountain peak. What are the distances right side of the mountain at which the defending ship can be safe from the bombardment of the attacking ship?

A pilot sets plane's speed for 500km/h. If they want the plane to head due south, but there is an 80km/h blowing from the west, then what should they set as the plane's heading?