If we exert 1200N on an object to cause it to accelerate 0.55m/s2, what is the mass of the object?

6. An explosion breaks an object initially at rest into two pieces, one of which has 1.4 times the mass of the other. If 7300 J of kinetic energy were released in the explosion, how much kinetic energy did the heavier piece acquire?

6. Two equal mass train cars move towards each other at the same speed. They link together and both stop moving at that point they collide. How can this be true if momentum must to be conserved.

8) Your mass is 68.8 kg, and the sled s mass is 11.3 kg. You start at rest, and then you jump off the sled, after which the empty sled is traveling at a speed of 3.10 m/s. What will be your speed on the ice after jumping off? Question 8 options:   0.36 m/s   0.71 m/s   0.61 m/s   0.51 m/s   9) Your mass is 87.6 kg, and the sled s mass is 14.4 kg. The sled is moving by itself on the ice at 3.16 m/s. You parachute vertically down onto the sled, and land gently. What is the sled s velocity with you now on it? Question 9 options:   0.45 m/s   0.32 m/s   0.77 m/s   0.61 m/s