Mechanical Engineering Answers

I am wanting to a 2 inch diameter water jet propulsion pump in my 8.6 ft. , 39 lb. Kayak with a 49cc single cylinder 2 stroke engine that weights 10.30 lb. An has 3 hp I want to know how fast will it be ?

You are driving on a very long, very straight 2 lane road, stuck behind a truck which
travels at a constant 75 km/hr. You want to overtake the truck, which has a length
of 12.0 m. Your car is 3.8 m long. To overtake the truck, and to do this safely, you
need to move to the other lane when the front of your car is no less than 10 m
behind the truck. You should return to your lane again, when the rear of your car is
10 m ahead of the truck. Your car has an acceleration of 2.0 ms-2
.
(a) What is the minimum distance you need to overtake the truck?
(b) How fast will you be going when you move back to the left-hand lane?
(c) Suppose that the cars coming in the opposite direction are travelling no
faster than 100 km/hr. Determine the minimum distance ahead that the
road must be clear of oncoming cars before you start to pass.

A 10kg cylinder of radius 8 cm is rotating in a symmetric
V - channel with angular velocity 3.14 rads
-1
. Write the free
body diagram and calculate the torque required to keep it
rotating with the same angular velocity?
Given: The co-efficient of friction between the cylinder and
the surface = 0.3.

Difference between conventional rigid intake manifold and tunned intake manifold

A wire 24 cm long will stand a straight pull of 100 N. The ends are fastened to two points 21 cm apart on the same level. What weight suspended from the middle of the wire will break it?

An electric motor of mass 30 kg is running at 500 rpm. The motor is supported by a spring of stiffness 7 kN/m and damper which offers a resistance of 60 N at 0.25 m/s. The unbalance of the rotor is equal to the mass of 0.8 kg m located at 50 mm from the axis of rotation. Determine the following for the above system: (j) damping factor (ii) amplitude of vibration and phase angle (iii) resonance speed and amplitude of vibration

Design a bushed pin flexible coupling to connect a moter shaft to a pump shaft transmitting 20 kw power at 1440 rpm. The allowed shear and crushing stress for steel shaft, key and pin are 40 mpa and 80 mpa respectively. The allowed shear iron flange is 10 mpa and the allowed bearing pressure for rubber bush is 0.5 mpa.

What is the yield strength of a metal sheet with thickness of max 300m and width max 4,000mm

I need to do an IA in the IB for Physics HL. I have in mind of doing it on bridge beams, and how a specific factor would affect the oscillation frequency of the beam, I was thinking I could make my variable the material of the beam, but I feel it’s rather simple. What else could my independent variable be?

1)A steel wire ABC 16m long having cross sectional area of 4mm2 weighs 20N . If the modulus of elasticity for the wire material is 200Gpa find the deflections at C and B

2)A max stress in a 6.36mm steel wide flange beam 100mm long moment of inertia 362mm4,modulus of elasticity 29,000Gpa with a load of 15kN.Calculate the max stress and deflection