Two marbles, of the same mass, moving in opposite directions, collide head on. The red marble is moving to the right at 6 m/s, the green marble is moving at 2 m/s. The red marble is brought to rest by the collision. What is the velocity of the green marble after the collision?
4 m/s to the right
3 m/s to the right
4 m/s to the left
8 m/s to the right
8 m/s to the left
What is the formula for a moment of a force?
Force x acceleration
Force x perpendicular distance from fulcrum
Momentum x perpendicular distance from fulcrum
Force x momentum
What is the nature of the gravitational force between two objects?
A sled of mass 60 kg is being pulled along the snow with a pulling force of 300 N. The resistance to its motion is 60 N. What is its acceleration?
- 4 m/s
- 5 m/s
What is weight measured in?
Which of the following are vector quantities
Calculate the force required to give a ball of mass 550 grams an acceleration of 300 metres per second squared.