 # Mechanical Engineering Objective Questions { Engineering Mechanics }

113. A weight of 500 kg is held on a smooth plane, inclined at 30° to the horizontal by a force P acting 30° above the plane. the force P should be

114. A weight of 500 kg is held on a smooth plane, inclined at 30° to the horizontal by a force P acting 30° above the plane. if the angle of friction be 30?, then force P would be

115. A bar AB resting against - smooth surfaces at A and B. The reaction at B will be in the direction

116. A freight car weighing 50,000 kg is moving with a velocity of one m/sec when it strikes a bumping post. If the draw bar spring on the car takes all of the compression, and the deflection is not to be more than 10 cm, then scale of spring should be approximately equal to

117. If a mass of 20 kg falling from a height of 1.0 m from rest is brought to rest by penetrating into sand by 1 m then average resistance offered by sand is?

118. A body weighing 1000 kg falls 8 cm and strikes a 500 kg/cm spring. The deformation of spring will be

119. An elevator weighing 1000 kg attains an upward velocity of 4 m/sec in two sec with uniform acceleration. The tension in the supporting cables will be

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