Physical Science NCFE

Front

A man jogs at a velocity of 2.5 m/s west for 1,200 s. He then walks at a velocity of 1.0 m/s east for 500 s and then stops to rest. What is the displacement of the man when he stops to rest?

Back

2,500m west

Front

The graph shows the motion of four cars. Based on the graph, which statement about all the cars is true?

Back

they are moving at a constant speed

Front

A rock on Earth has a mass of 750 kg and a weight of 7,350 N. If the rock is taken into outer space, how will its mass and weight be affected?

Back

The mass will be 750 kg, but the weight will decrease because of the effects of gravity.

Front

As the wheels of a train move along the train tracks, what type of friction exists between the wheels and the tracks?

Back

rolling friction

Front

A 1,500-kg truck has a net force of 4,200 N acting on it. What is the truck’s acceleration?

Back

2.8 m/s/s

Front

A child fills a bucket with salt water and sand. How are the contents of the bucket classified? Options: a solution, a compound, a homogeneous mixture, a heterogeneous mixture

Back

a heterogeneous mixture

Front

This diagram shows a 40-kg object being pulled in one direction while friction acts on it in the opposite direction. What is the net force on the object?

Back

120 N

Front

How are the processes of melting and freezing similar?

Back

They are both processes that physically change a substance.

Front

Which element is classified as a metal? Options: boron (B), antimony (Sb), phosphorus (P), cadmium (Cd)

Back

cadmium (Cd)

Front

How will the liquids (ethanol, milk, oil, and water) be arranged from bottom to top in a beaker?

Back

milk, water, oil, ethanol