Physics Quiz

Benjamin is riding his bicycle and suddenly stops pedaling. Which statement best describes what happens to the bicycle due to inertia?

• Inertia is an object’s tendency to maintain its mass.

• Inertia is an object’s tendency to stay at rest only.

• Inertia is an object’s tendency to stay in motion only.

• Inertia is an object’s tendency to stay at rest or, if moving, to keep moving.

A car with a mass of 1200 kg is subjected to a net external force of 3600 N. What is the car's acceleration? a = F/m

• 3.0 m/s²

• 2.5 m/s²

• 3.5 m/s²

• 2.0 m/s²

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A 150-kg sled is resting on a horizontal surface. The coefficient of static friction between the sled and the ground is 0.55, and the coefficient of kinetic friction is 0.25. What is the normal force acting on the sled?

• 1470 N

• 825 N

• 1650 N

• 367 N

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You are on a frictionless ice rink and push against a railing with a force of 50 N. What is the force exerted by the railing on you?

• 25 N

• 50 N

• 75 N

• 0 N

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A person on a frictionless skateboard pushes against a wall with a force of 30 N. If the person's mass is 60 kg, what is their acceleration?

• 0.5 m/s²

• 0.3 m/s²

• 0.6 m/s²

• 0.4 m/s²

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NGSS.MS-PS2-2

A satellite is orbiting 3.0 x 10^5 m above Mars. Mars has a mass of 6.42 x 10^23 kg and a radius of 3.39 x 10^6 m. What is the gravitational acceleration experienced by the satellite? g = Gm_m/r^2 G = 6.67 x 10^-11 N m^2/kg^2

• 3.14 m/s^2

• 4.25 m/s^2

• 3.92 m/s^2

• 4.50 m/s^2

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