Mize Physical Science Motion and Forces

Justin was sitting in the school bus, which was parked in front of the school. Another bus pulled up beside him and stopped to wait for a pedestrian to cross in front of it. His friend, Elijah, was on the other bus. After the walker crossed, Elijah's bus pulled out. To Elijah, how does it appear that Justin's bus is moving?

• From Elijah’s frame of reference, Justin’s bus is not moving

• From Elijah’s frame of reference, Justin’s bus is moving forward

• From Elijah’s frame of reference, Justin’s bus is moving backward

• not enough information to tell.

A passenger walks 4 km per hour toward the front of a train that is moving 50 km per hour. What is her motion as seen from the reference point of a passenger seated in the same train.

• She is not moving

• She is moving 2 km per hour

• She is moving 4 km per hour

• She is moving 54 km per hour

A passenger walks 4 km per hour toward the front of a train that is moving 50 km per hour. What is her motion relative to someone standing next to the tracks as the train passes by.

• She is not moving

• She is moving 4 km per hour

• She is moving 50 km per hour

• She is moving 54 km per hour

Four identical tennis balls are dropped at the same time and from the same height. Ball 4 lands first. Why?

• the parachute is bigger, producing more drag.

• the parachute is smaller, producing less drag.

• the parachute is circular, producing more drag.

• the parachute is a rectangle, producing less drag.

Tags

NGSS.MS-PS2-2

What forces are acting on a bowling ball that is rolling down the lane?

• gravity and friction

• applied force, normal force, gravity, and friction

• gravity

• normal force and gravity

Tags

NGSS.MS-PS2-2

A rocket launching into space is a good example of which of Newton's Laws?

• Law of Inertia

• Law of Acceleration

• Law of Action-Reaction

An object in motion stays in motion, and an object at rest stays at rest unless acted on by an external force

• Law of Inertia

• Law of Acceleration

• Law of Action-Reaction

Which of the following is the best example of Newton's Law of Inertia (Law 1)?

• A car hitting a wall versus a plane hitting a wall

• A bird pushing it's wings down and the air pushing back up on the bird.

• A boy riding on a bike and flying over the handlebars when he hits a rock

• A person sitting in a chair

A contact force that resists the sliding motion between two objects that are touching.

• friction

• normal force

• non-contact force

• gravity

This diagram represents which of Newton's Laws?

• Law of Inertia

• Law of Acceleration

• Law of Action-Reaction

Tags

NGSS.MS-PS2-1