A spherical ball of mass m = 5 kg rests between two planes which make angles of 300 and 450 respectively with the horizontal. Calculate the contact forces at A and B.ī-7. The 50 kg homogeneous smooth sphere rests on the 30º incline A and bears against the smooth vertical wall B. (b)Ĝalculate normal reactions between the cylinder and two inclined walls.ī-6. (ii)Ĝalculate force exerted by ground surface on the sphere.ī-5.Ě cylinder of weight w is resting on a fixed V-groove as shown in figure. (i)Ĝalculate force exerted by walls on the sphere. Now block is released from rest, calculate normal reaction between block and inclined plane.ī-4.Ě sphere of mass ‘m’, radius ‘R’ placed between two vertical walls having separation ‘d’ which is slightly greater than ‘2R’ : (iv)Ĝalculate force exerted by ground surface on mass m1 and m2ī-3.Ě block of mass ‘m’ is placed on inclined plane as shown in figure. (iii) What will be the value of normal force between m1 and m2. (ii)Ĝalculate the contact force between m1 and m2. Two forces of magnitude F act on m1 and m2 in opposite directions. Two blocks of masses m1 and m2 are placed on ground as shown in figure. Calculate contact force between ground and block.ī-2. A block of mass ‘m’ is placed on ground and an additional force F = mg is applied on the block as shown in figure. SECTION (B) :ĜALCULATION OF NORMAL REACTIONī-1. The pulley is frictionlessĪnd massless and all surfaces are smooth.Ī-9.ĝraw the FBD for the following individual parts of the systems : (Pulley are massless and friction less) Identify all action-reaction pairs between two blocks. (ii) Give action–reaction pair involved in the above problem.Ī-8.ĝraw free body diagrams for masses m and M shown in figure. of the sphere of mass M placed between a vertical wall and ground as shown in figure (All surfaces are smooth).Ī-7.Ě block of mass 1 kg placed on ground is pulled by a string by applying 10 N force : (g = 10 m/s2) Two forces of same magnitude act on an isolated body in opposite directions to keep it at equilibrium position, is this true according to Newton’s third law ?Ī-6.ĝraw F.B.D. Calculate the magnitude of force exerted by ‘B’ on ‘A’.Ī-5. Which force is responsible for your deceleration ?Ī-4.Ě block ‘A’ exerts a force on ‘B’ of magnitude 20 N. When you suddenly find a snake in front of you, you stop quickly. Which one out of four fundamental forces is the weakest force between two protons at a distance of 1 Fermi.Ī-3. Which type of forces does a proton exerts on a proton ?Ī-2. The object’s mass is measured to be 5 kg.SECTION (A) : TYPE OFğORCES, NEWTON’S THIRD LAW, FREE BODY DIAGRAM :Ī-1. The change in time for this problem is 3 seconds. The final velocity of this object is 20m/s. In this example problem, the initial velocity is measured to be 50 m/s. The following example outlines the steps and information needed to calculate Deceleration Force.įirst, determine the initial velocity. Deceleration happens when the velocity is reduced in size or changed to a point in the opposite direction, but not when it stays constant. The acceleration of an object changes its velocity by altering both its speed and direction. A deceleration force acts to slow down the object, and it is the opposite of an acceleration force. What is a Deceleration Force?Ī deceleration force is a force that opposes an object’s current direction of motion. To calculate the deceleration force, subtract the final velocity from the initial velocity, divide by time, then multiply by the mass.
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