This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Force And Laws Of Motion > Class 9 Science Chapter 9 Force And Laws Of Motion – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 7 (3 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A hammer of mass 300 g, moving at 40m/s, strikes a nail. The nail stops the hammer in a very short time of 0.02 s. The force of the nail on the hammer is A) 600N. B) 1200N. C) 2000N. D) 2500N. Show Answer Correct Answer: A) 600N. 2. A cricket ball of mass 100 g with a speed of 30 m/s is brought to rest by a player in 0.03 s. What is the change of momentum and average force applied by the player respectively? A) -3 Kgm/s &-100 N. B) 109 N & 5 Kgm/s. C) 5 Kgm/s &-100 N. D) -3 Kgm/s &-90 N. Show Answer Correct Answer: A) -3 Kgm/s &-100 N. 3. A 10 kg mass is dropped from a tall rooftop and accelerates at 9.8 m/s$^{2}$. What is the weight of the dropped object? A) 0 N. B) 9.8 N. C) 198 N. D) 98 N. Show Answer Correct Answer: D) 98 N. ← PreviousRelated QuizzesScience QuizzesClass 9 QuizzesClass 9 Science Chapter 9 Force And Laws Of Motion Quiz 1Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 2Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 3Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 4Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 5Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 6 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books