Forces
Motion
Density
Moment
Waves
100
A car moves along a level road.
The diagram shows all of the horizontal forces acting on the car.
Which statement is correct?
A car moves along a level road.
The diagram shows all of the horizontal forces acting on the car.
Which statement is correct?
The car is speeding up.
100
A car travels 66 km in 2 hours. What is the car’s average speed?
33km/hr
100
The tool used to measure the mass of a substance or object is a ______________.
balance
100
Weight of A will make the beam .....
rotate clockwise
100
#1 refers to the
wavelength
200
A ball of mass 0.50 kg falls and hits the floor at 10 m / s.
It rebounds at speed 8.0 m / s, as shown.
The collision between the ball and the floor lasts for 0.50 s.
What is the average force acting on the ball during the collision?
18 N upwards
200
If a bus is traveling 40 km/hr, How long will it take the bus to reach a destination that is 100 km away?
2.5hr
200
25.0 cm3
200
A system will be in .......A........ (stable) condition when the its centre of mass is still ..........B........... base of support. A system will be in imbalanced (unstable) condition when its centre of mass is outside ...........C............
What is B and C to make the sentences correct?
B = in, C = base of support
200
A wavelength is the distance between which 2 points?
B and G
300
1.6Nm
300
Every year, Lena travels home for thanksgiving. Lena goes 800miles in 10hours. What is Lena's average speed on her trip?
80mi/hr
300
syrup
300
The see-saw is in equilibrium. What is F?
200 N
300
Which wave in the diagram has the greatest wavelength?
3
400
A ball is dropped from a table-top. Air resistance may be ignored.
Which row describes the velocity and the acceleration of the ball at point X
acceleration = constant; velocity = increasing
400
Steeper gradient: Moving faster
400
4 g/cm3
400
What is the meaning of net moment is zero?
anticlockwise moment = clockwise moment
400
When the frequency of a wave increases, what happens to the wavelength?
The wavelength decreases.
500
The diagram shows a tug-of-war between team X and team Y. The arrows show the forces exerted by the teams on the rope.
What is the size of the resultant force on the rope and in which direction does the resultant force act?
size of resultant force = 75 N; direction of resultant force = to the right.
500
The object is accelerating (getting faster)
500
What is the formula for density?
density = mass / volume
500
Which statement about pivot is CORRECT?
Pivot is fixed
500
This picture is an example of which type of wave?
compression wave