speed/velocity
A car travels from point A to B in 3 hours and returns back to point A in 5 hours. Points A and B are 150 miles apart along a straight highway. Which of the following statements most accurately describes the motion of the car?
The average speed is 37.5 miles per hour.
What is the correct equation for calculating weight?
An object of mass 100g moves in circular path of radius 0.5m, under the influence of a 15N force directed radially inwards towards the center of the path. How much work is done by this force as the object moves one quarter of the way around the circle?
0j
What happens to the resistance of an thermistor as the temperature rises?
How do we calculate refractive index?
A police car accelerates quickly to 60 meters per second in order to pursue a minivan that is recklessly speeding along the highway at 45 meters per second. How long will it take the police car to catch up if the minivan is 600 meters ahead of the police car at the beginning of the chase?
40 seconds
What is the definition of inertial mass? - Higher
What is the work done by gravity if a 50kg block is pushed along a 40m track?
0
The combined resistance of two resistors connected in series is 55 Ω. One of the series resistors is 30 Ω. What is the size of the second resistor?
Through which medium does sound travel the fastest?
At time t = 1 min the car is traveling at a velocity of 20 meters per second, and at time t = 2 min the car reaches a velocity of 40 meters per second. Which statement best describes the car’s motion during this time interval?
The car’s average acceleration is 0.33 m/s
A car has a mass of 1500 kg, and an engine that can deliver a force of 6000 N. Find the acceleration of the car.
How much work is done to lift a 2kg block to a point 1m above its resting location?
19.6j
A series circuit has two identical resistors. A current of 4 A flows from the battery. What is the value of the current through each resistor?
4 A
In which does light travel the fastest?
An object is dropped from the top of the Empire State Building. Which of the following statements best describes the motion of the object as it experiences air resistance during its downward fall?
Its acceleration will decrease until the object starts moving with a constant speed.
Two forces act on an object. 12 N acts to the right and 5 N to the left. What is the resultant force?
What is the work done on a 45kg box that is being pushed with a 100N force for 5m?
500j
A 6 V battery is connected to a lamp. The current is 2 A. What is the resistance of the lamp?
What type of wave is a sound wave?
Which of the following statements best represents an example of instantaneous velocity?
The projectile was traveling upward at 50 meters per second ten seconds after its launch from the cannon.
What is the acceleration of a 420 g object subject to a 15 N resultant force?
A 2kg box slides down a ramp a distance of two meters before it reaches the ground. The ramp has an angle of 30o. The coefficient of kinetic friction for the ramp is 0.1.
20j
What happens to the resistance of an LDR (light dependent resistor) as the light level increases?
What is the law of reflection?