Welcome to PHY 105 Quiz
Overview:
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Date: February 7, 2025
Duration: 25 minutes
No of Questions: 21 Questions
Course: PHY 105
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1.
PHY105
Which of the following statement is not correct?
2.
PHY105
Which of the following statement(s) is/are correct? I. When an object's velocity and its acceleration are in the same direction, its speed increases with time. II. When an object's velocity and its acceleration are in the same direction, its speed decreases with time. III. When an object's velocity and its acceleration are in opposite direction, it's speed increases with time. IV. When an object's velocity and its acceleration are in opposite direction, it's speed decreases with time.
3.
PHY105
A racecar starting from rest accelerates at a constant rate of 5.00m/s². What is the velocity after it has traveled 1200 inches?
4.
PHY105
A body A moving in a straight line with velocity v makes a collision with a body B initially at rest.After collision B acquires a velocity of 1.6v .Assuming the bodies to be perfectly elastic ,what is the ratio of the mass of B to that of A?
5.
PHY105
Which of the following statements is FALSE?
6.
PHY105
The documentation for your slot-car set says that the maximum centripetal acceleration the cars can withstand without being ejected from the track is 3.8 meters per second squared. You notice that the slot cars fly off the track if they exceed 1.1 meters per second. What is the radius in meters of the curve in the track?
7.
PHY105
If Michael Jordan has a vertical leap of 1.29 m, then what is his hang time (total time to move upwards to the peak and then return to the ground)?
8.
PHY105
75-kg skydiver is falling from a height 200m. At an instant during the fall, the skydiver encounters a resistant force of 500N. Determine the acceleration of the skydiver at this instant.
9.
PHY105
A cricket ball is thrown at an angle 20° to the horizon at a speed of 11.0m/s. How long does it take to strike the projection plane again?
10.
PHY105
Which of the following represents the greatest speed?
11.
An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s2. The takeoff speed for this plane will be 65 m/s. Assuming this minimum acceleration, what is the minimum allowed length for the runway?
12.
PHY105
Which of the following is the correct dimension for power?
13.
PHY105
A projectile is fired horizontally with a speed of 30m/s from the top of a cliff 80m high making and angle of 30° to the horizontal. Determinate the time it takes to strike the level ground at the base of the cliff.
14.
PHY105
Find the magnitude and direction of the resultant of the following forces: F1 = (5.0î - 2.5j)N, F2 = (-7.5j)N and F3 = (2.5î)N.
15.
PHY105
A fan turns at the rate of 900rpm. Find the tangential speed of the tip of the blade if the distance from the centre to the tip is 20cm
16.
PHY105
A centrifuge accelerates uniformly from rest to 15,000rpm in 220s. Through how many revolutions did it turn in this time?
17.
PHY105
A 2000kg car stopped at a traffic light is struck from the rear by a 500kg car. The two cars entangled and moved in the direction of the car moving at 25m/s before the collision. What is the final velocity of the car?
18.
PHY105
You twirl a lasso over your head at a constant angular speed of 3.8 radians per second. What is the centripetal acceleration in meters per second squared of the lasso’s tip, 1.4 meters from your hand?
19.
PHY105
What is the net force required to keep a 5kg object moving with a constant velocity of 25.0m/s
20.
PHY105
A 500kg crate is sliding down an inclined plane. The plane is inclined at an angle of 30°. The coefficient of friction between the crate and the incline plane is 0.33. Determine the acceleration of the crate.
21.
PHY105
Which of the following quantities is not a vector?
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