Newton's Laws of Motion

Front

A meteor moving 468 km per minute traveling in a south-to-north direction passed near Earth in 2013. Because the meteor was only 45 m wide and was 27,700 km above Earth's surface, it was not visible without the aid of a telescope. Which statement describes the meteor's motion? Options: Its velocity was 7.8 km/s northward., Its acceleration was 468 km/s²., Its speed was 468 km/s northward., Its acceleration was 7.8 km/s².

Back

Its velocity was 7.8 km/s northward.

Front

A student graphed the position of a cart during a 7-second time interval. Which statement best describes the cart? Options: The cart was stationary with a velocity of 0 m/s for the entire 7 seconds. The cart was stationary except for a short burst of acceleration of 0.5 m/s². The cart moved at a constant velocity of 0.5 m/s for the entire 7 seconds. The cart accelerated at a constant rate of approximately 0.8 m/s².

Back

The cart moved at a constant velocity of 0.5 m/s for the entire 7 seconds.

Front

Which of the following best describes the velocity of an object? 30 m/s, 30 m east, 30 m/s east, 30 m/s²

Back

30 m/s east

Front

What is the difference between the velocity and the speed of an object?

Back

Velocity has a direction associated with it, while speed has no specific direction.

Front

Why does the pickup truck have a changing velocity while traveling at 15 m/s?

Back

is traveling on a curve in the road

Front

An action-reaction pair of forces exists between -

Back

the aerialist's feet and the rope

Front

Which box would experience the greatest acceleration when an unbalanced force of 8 N is applied? Options: The box with a mass of 2 kg, The box with a mass of 4 kg, The box with a mass of 6 kg, The box with a mass of 8 kg.

Back

The box with a mass of 2 kg

Front

The unusual strength of a glue makes it able to hold a heavy object, or load, as shown in the diagram below. If the load exerts a strong downward force, the glue -

Back

exerts an upward force that is equal to the downward force

Front

Two forces applied to a 17 kg box on a smooth surface. Which statement best describes the acceleration of the box?

Back

The box accelerates at 1.0 m/s² to the right because the net force is 17 N to the right.

Front

Which objects in the list experience an unbalanced force? The book, the ball, and the car, The ball, the car, and the bird, The can, the swing, and the bird, The book, the ball, the can, and the swing

Back

The can, the swing, and the bird