PRE-TEST in General Physics 1 (2ND QUARTER)
Quiz by Mark Paulo San Juan
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- Q 1/30Score 0
A body remains stationary on an inclined plane. Which of the following correctly describes the frictional force on the body and the resultant force respectively?
29down the plane; zero
up the plane; zero
zero; down the plane
zero; vertically downwards
- Q1
A body remains stationary on an inclined plane. Which of the following correctly describes the frictional force on the body and the resultant force respectively?
down the plane; zero
up the plane; zero
zero; down the plane
zero; vertically downwards
45s - Q2
Which of the following is not a valid example of action and reaction to which Newton's third law of motion applies?
The forces of repulsion between two parallel wires carrying currents in opposite direction.
The weight of a satellite and the centripetal force keeping the satellite in orbit.
The forces of attraction between two gas molecules passing near each other.
The forces of attraction between an electron and a proton in a hydrogen atom.
45s - Q3
Three blocks of masses 2.5 kg, 1.5 kg and 2.0 kg on a smooth surface are connected by two inelastic strings and pulled by a force of 15.0 N. The tensions in the strings connecting the blocks are T1and T2. What are the values of the tension T1and T2?
T1 = 5.00 N; T2 = 10.0 N
T1 = 2.50 N; T2 = 3.00 N
T1 = 8.75 N; T2 = 5.00 N
T1 = 7.50 N; T2 = 7.50 N
300s - Q4
Two bodies P and Q of different masses on a smooth table are connected by a light elastic string. A person pulls P and Q apart, and then release them. Which of the following is of the same magnitude for both P and Q?
Speed
Distance moved
Force
Acceleration
45s - Q5
A load of weight Whangs from 2 ropes as shown in the figure. The tensions in the rope are T1and T2.Whichtriangle represents the equilibrium of the three forces W, T1and T2?
120s - Q6
A stone at the end of a string is whirled in a horizontal circle on a smooth surface with increasing speed. If the string snaps when the stone is at P as shown in the figure, in which direction would the stone move?
Green Arrow
Yellow Arrow
Red Arrow
Blue Arrow
60s - Q7
A car of mass 2200 kg goes round a bend which has a radius of curvature 50 m. The coefficient of static friction between the tires of the car and the road is 0.70. At what maximum speed is the car able to go round the bend without skidding?
26.2 m/s
18.5 m/s
13.1 m/s
20.0 m/s
300s - Q8
A ball is dropped from a height and falls freely. The gain in kinetic energy of the ball is______________________.
equal to the potential energy of the ball
directly proportional to the distance fallen
directly proportional to the gain in the speed
equal to the work done against air resistance
60s - Q9
A ball of mass 0.50kg is thrown vertically upwards with a speed of 12.4 m/s. After rising to a height of 0.50 m, its speed is 7.0 m/s. What is the value of the average air resistance?
0.3333 N
4.91 N
12.2 N
1.67 N
300s - Q10
A constant force acts on a body which is initially at rest, but is free to move. By neglecting friction, which of the graphs best represents the power P supplied to the body with time t?
120s - Q11
A box of mass 10 kg is carried in a lift from level 1 to level 10 of a building. If the vertical distance between two levels is 3 m, calculate the work done on the box.
3000 J
270 J
2700 J
300 J
120s - Q12
In which of the following situation work is done?
Student C prepares very well for his Physics exam.
Student B lifts his water bottle from the floor.
Student D walks 5km from his house to school.
Student A pushes against a steady whiteboard.
60s - Q13
Which of the following has the LEAST amount of momentum?
0.01 kg mass moving at 200 m/s
2,000kg mass moving at 0.1 m/s
1 kg mass moving at 35 m/s
100 kg mass moving at 3 m/s
300s - Q14
Before striking the pins, A bowling ball has 50 kg m/s of Momentum. Afterwards, the bowling ball slows and has a momentum of only 20 kg m/s. What is the Impulse of the bowling ball system?
20 kg m/s
30 kg m/s
-20 kg m/s
-30 kg m/s
300s - Q15
Two objects are stuck together and are not moving. An explosion rips the two apart. One piece with amass of 250 kg goes right at 25 m/s. What is its momentum?
-6250 kg m/s
10 kg m/s
6250 kg m/s
-10 kg m/s
300s
