As shown in Fig. 6.39, a landing mat or soft sand bed yields under the falling athlete, increasing the time duration taken to bring their high downward velocity to zero. From Newton's second law of motion, rate of change of momentum is proportional to force. By extending this stopping time, the acceRead more
As shown in Fig. 6.39, a landing mat or soft sand bed yields under the falling athlete, increasing the time duration taken to bring their high downward velocity to zero. From Newton’s second law of motion, rate of change of momentum is proportional to force. By extending this stopping time, the acceleration and the resulting impact force decrease substantially, protecting the athlete from severe impact injuries.
For more NCERT Solutions of Class 9 Science Exploration Chapter 6 How Forces Affect Motion Question Answer (2026-27)
Yes, the boat will move in the backward direction away from the shore as depicted in Fig. 6.38. To propel himself forward onto the land, the sailor must push his feet backward against the boat. According to Newton's third law of motion, the boat simultaneously exerts an equal and opposite reaction fRead more
Yes, the boat will move in the backward direction away from the shore as depicted in Fig. 6.38. To propel himself forward onto the land, the sailor must push his feet backward against the boat. According to Newton’s third law of motion, the boat simultaneously exerts an equal and opposite reaction force pushing the sailor forward, while the sailor’s backward action force drives the boat backward.
For more NCERT Solutions of Class 9 Science Exploration Chapter 6 How Forces Affect Motion Question Answer (2026-27)
Option (iii) is correct. In Fig. 6.37, Object B is stationary with zero velocity, while Objects A and D have straight line graphs representing uniform motion at constant velocity with zero acceleration. Object C has a curved position-time graph showing continuously increasing velocity. Since ObjectRead more
Option (iii) is correct. In Fig. 6.37, Object B is stationary with zero velocity, while Objects A and D have straight line graphs representing uniform motion at constant velocity with zero acceleration. Object C has a curved position-time graph showing continuously increasing velocity. Since Object C possesses non-zero acceleration, a non-zero net external force acts on it according to Newton’s second law.
For more NCERT Solutions of Class 9 Science Exploration Chapter 6 How Forces Affect Motion Question Answer (2026-27)
Option (iv) is the correct statement. According to Newton's second law of motion, the acceleration produced in a body is directly proportional to the applied net force and takes place in the direction in which that net force acts. Inversely, acceleration is inversely proportional to the mass of theRead more
Option (iv) is the correct statement. According to Newton’s second law of motion, the acceleration produced in a body is directly proportional to the applied net force and takes place in the direction in which that net force acts. Inversely, acceleration is inversely proportional to the mass of the object, making options (i), (ii) and (iii) incorrect.
For more NCERT Solutions of Class 9 Science Exploration Chapter 6 How Forces Affect Motion Question Answer (2026-27)
Let the length of the shorter diagonal be d cm. Then the longer diagonal is 2d cm. The formula for the area of a rhombus is: Area = (1/2) x diagonal 1 x diagonal 2 Given Area = 128 cm²: (1/2) x d x 2d = 128 d² = 128 Taking square root on both sides: d = √128 = √(64 x 2) = 8√2 cm. In decimal form, 8√Read more
Let the length of the shorter diagonal be d cm.
Then the longer diagonal is 2d cm.
The formula for the area of a rhombus is:
Area = (1/2) x diagonal 1 x diagonal 2
Given Area = 128 cm²:
(1/2) x d x 2d = 128
d² = 128
Taking square root on both sides:
d = √128 = √(64 x 2) = 8√2 cm.
In decimal form, 8√2 is approximately 8 x 1.414 = 11.31 cm.
Therefore, the shorter diagonal is 8√2 cm.
For more NCERT Solutions of Class 9 Ganita Manjari Chapter 6 Measuring Space: Perimeter and Area Question Answer (2026-27)
During a high jump event, a landing mat or sand bed is placed for the athlete to fall upon (Fig. 6.39). Explain the reason behind it.
As shown in Fig. 6.39, a landing mat or soft sand bed yields under the falling athlete, increasing the time duration taken to bring their high downward velocity to zero. From Newton's second law of motion, rate of change of momentum is proportional to force. By extending this stopping time, the acceRead more
As shown in Fig. 6.39, a landing mat or soft sand bed yields under the falling athlete, increasing the time duration taken to bring their high downward velocity to zero. From Newton’s second law of motion, rate of change of momentum is proportional to force. By extending this stopping time, the acceleration and the resulting impact force decrease substantially, protecting the athlete from severe impact injuries.
For more NCERT Solutions of Class 9 Science Exploration Chapter 6 How Forces Affect Motion Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-6/
See lessA sailor jumps out from a small boat to the shore (Fig. 6.38). As the sailor jumps forward, will the boat move? If yes, in which direction and why.
Yes, the boat will move in the backward direction away from the shore as depicted in Fig. 6.38. To propel himself forward onto the land, the sailor must push his feet backward against the boat. According to Newton's third law of motion, the boat simultaneously exerts an equal and opposite reaction fRead more
Yes, the boat will move in the backward direction away from the shore as depicted in Fig. 6.38. To propel himself forward onto the land, the sailor must push his feet backward against the boat. According to Newton’s third law of motion, the boat simultaneously exerts an equal and opposite reaction force pushing the sailor forward, while the sailor’s backward action force drives the boat backward.
For more NCERT Solutions of Class 9 Science Exploration Chapter 6 How Forces Affect Motion Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-6/
See lessThe position-time graph for four objects A, B, C and D moving along straight line are given in Fig. 6.37. A net force acts on: (i) Object A (ii) Object B (iii) Object C (iv) Object D
Option (iii) is correct. In Fig. 6.37, Object B is stationary with zero velocity, while Objects A and D have straight line graphs representing uniform motion at constant velocity with zero acceleration. Object C has a curved position-time graph showing continuously increasing velocity. Since ObjectRead more
Option (iii) is correct. In Fig. 6.37, Object B is stationary with zero velocity, while Objects A and D have straight line graphs representing uniform motion at constant velocity with zero acceleration. Object C has a curved position-time graph showing continuously increasing velocity. Since Object C possesses non-zero acceleration, a non-zero net external force acts on it according to Newton’s second law.
For more NCERT Solutions of Class 9 Science Exploration Chapter 6 How Forces Affect Motion Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-6/
See lessWhen a net force acts on an object, we observe that the object accelerates: (i) opposite to the direction of force, with acceleration proportional to the force acting on the object. (ii) opposite to the direction of force, with acceleration proportional to the mass of the object. (iii) in the direction of force, with acceleration inversely proportional to the force acting on the object. (iv) in the direction of force, with acceleration proportional to the force acting on the object.
Option (iv) is the correct statement. According to Newton's second law of motion, the acceleration produced in a body is directly proportional to the applied net force and takes place in the direction in which that net force acts. Inversely, acceleration is inversely proportional to the mass of theRead more
Option (iv) is the correct statement. According to Newton’s second law of motion, the acceleration produced in a body is directly proportional to the applied net force and takes place in the direction in which that net force acts. Inversely, acceleration is inversely proportional to the mass of the object, making options (i), (ii) and (iii) incorrect.
For more NCERT Solutions of Class 9 Science Exploration Chapter 6 How Forces Affect Motion Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-6/
See lessOne diagonal of a rhombus is twice as long as the other diagonal. If the rhombus has area 128 cm², find the length of the shorter diagonal.
Let the length of the shorter diagonal be d cm. Then the longer diagonal is 2d cm. The formula for the area of a rhombus is: Area = (1/2) x diagonal 1 x diagonal 2 Given Area = 128 cm²: (1/2) x d x 2d = 128 d² = 128 Taking square root on both sides: d = √128 = √(64 x 2) = 8√2 cm. In decimal form, 8√Read more
Let the length of the shorter diagonal be d cm.
Then the longer diagonal is 2d cm.
The formula for the area of a rhombus is:
Area = (1/2) x diagonal 1 x diagonal 2
Given Area = 128 cm²:
(1/2) x d x 2d = 128
d² = 128
Taking square root on both sides:
d = √128 = √(64 x 2) = 8√2 cm.
In decimal form, 8√2 is approximately 8 x 1.414 = 11.31 cm.
Therefore, the shorter diagonal is 8√2 cm.
For more NCERT Solutions of Class 9 Ganita Manjari Chapter 6 Measuring Space: Perimeter and Area Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-6/
See less