An unbalanced force of 30 N gives an object an acceleration of 6.0 m/s2. What force would be needed to give it an acceleration of 1.0 m/s2?
5 N
15
A 20-kg block of cement is pulled upward (not sideways!) with a force of 400 N. What is the acceleration of the block?
10 m/s/s
15
A 60-kg person on in-line skates pushes against a wall with a force of 30 N and recoils. What acceleration does that person experience?
0.5 m/s/s
15
A 30-kg girl runs up the staircase to a floor 5 m high in 8 seconds. What is her power output?
187.5 Watts
15
Calculate the number of millimeters in 2.13 kilometers.
2130000
15
Two forces act on you when you are standing motionless on the floor, the force due to gravity and the force of the floor. These two forces are equal and opposite. Are they the action- reaction forces?
NO!
15
What is the reaction force to your weight?
You pull the Earth
15
Which has more Inertia 10 kg object or a 50 kg object?
