# A ball impinges directly upon another similar ball at rest and itself comes to rest due to impact. During collision, half of the kinetic energy gets dissipated. The coefficient of restitution will be

1.  0.25

2.  0.5

3.  0.707

4.  0.84

4

0.707

Explanation :
No Explanation available for this question

# A ball is dropped from a height of 2.25 m on a smooth floor and it rises to a height of 1m after the first bounce. The coefficient of restitution between the ball and the floor is

1.  0.57

2.  0.44

3.  0.33

4.  0.67

4

0.67

Explanation :
No Explanation available for this question

# A sphere P impinges directly onto another identical sphere Q at rest. If the coefficient of restitution is 0.5, the ration of velocities Vq /Vp after the impact would be

1.  1:1

2.  2:1

3.  3:1

4.  1:3

4

3:1

Explanation :
No Explanation available for this question

# A wooden sphere of mass 1 kg suspended on a string which is 1 metre long. A bullet of mass 50 grams is shot at the sphere with a velocity V0 and becomes embedded in it. Because of the impact, the sphere is raised a distance of 0.2 m above the horizontal. What is V0 of the bullet Assume that, g=10 m/sec2

1.  26 m/sec

2.  35 m/sec

3.  42 m/sec

4.  4.2 m/sec

4

42 m/sec

Explanation :
No Explanation available for this question

# A ball impinges directly upon another ball at rest, and itself comes to rest due to impact. If half of the initial kinetics energy is destroyed in collision the coefficient of restitution will be

1.  1

2.  0.5

3.  0.25

4.  1/√2

4

0.5

Explanation :
No Explanation available for this question

# A ball is allowed to fall freely from a height of 3 metres on a fixed plate. If the successive rebound heights are h1, h2, h3….. etc, the distance covered by the ball before coming to rest, if the coefficient of restitution e = 0.5 will be

1.  1/6

2.  1/5

3.  1/4

4.  1/3

4

1/3

Explanation :
No Explanation available for this question

# A ball, falling vertically strikes a 300 frictionless inclined plane and rebounds horizontally. The coefficient of restitution will be

1.  1/6

2.  1/5

3.  1/4

4.  1/3

4

1/3

Explanation :
No Explanation available for this question

# A steel ball is dropped from a height h1 onto a steel plate and rebounds to a height h2. The coefficient of restitution between the ball and plate will be

1.  h1 /h2

2.  h2 /2h1

3.  √(h2 /2h1)

4.  √(h2 /h1)

4

√(h2 /h1)

Explanation :
No Explanation available for this question

# A bullet of mass 0.33 kg moving with a speed of 400./sec penetrates 12cm into a fixed block of wood. The average force exerted by the wood on the bullet will be

1.  10 kN

2.  20 kN

3.  30 kN

4.  40 kN

4

20 kN

Explanation :
No Explanation available for this question

1.  n /(n+1)

2.  n/ (n+1)2

3.  2n /( n+1)2

4.  4n/ (n+1)2

4