A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

A straight line means the object travels at ... speed

A region of space that contains no matter

a book is being pushed left with 3 N of force, and forward (at a 90 degree angle to the left force) with 4 N of force. what is the net force on the book?

The gravitational force a. is a natural force like the strong and weak nuclear forces. b. weakens as 1/d, where d is the distance between objects. c. is the fundamental force repelling two masses from each other. d.

An object weighs more on the mood because there is more gravity on the moon

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

A cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's top speed in m/s?

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?