Science in long Jumping

      The length of long jump by an athlete can be increased by keeping the jumper in air as long as possible and making him run forward as fast as possible before jumping. In these games the place is provided with a sand pit or straw bed to prevent the athlete from any injury.

 

While covering the long jump the athlete makes a projectile motion and lands on the surface.

 

Question 1:

Why does the athlete take a long run before jumping?

1. To increase the inertia of motion
2. To decrease the inertia of motion
3. To reduce the effect of gravity while jumping
4. To reduce air friction

 

Answer : a

 

Question 2:

What do you think the sand pit or the straw bed actually do to keep the athlete safe?

1. Provide time delay for the change in momentum
2. Soft surface of straw bed and sand pit
3. It is the techniques of athlete which prevent themselves
4. None of the above

Answer : a

Question 3:

What would be the angle of projection of jumping to cover maximum distance?

1. 30°
2. 45°
3. 60°
4. 90°

Answer : b

Question 4:

What would be the shape of the path of motion of the athlete during jumping in air?

1. Hyperbola
2. Parabola
3. Circular
4. Not specified path

Answer : b