2333229
Descripción
Test por Rachel_ellen, actualizado hace más de 1 año
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Creado por Rachel_ellen
hace alrededor de 9 años
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Pregunta 1
Pregunta
What is the equation for speed?
Respuesta
-
time / distance
-
change in speed / time taken
-
time x distance
-
distance / time
Pregunta 2
Pregunta
A steeper slope means a slower speed
Respuesta
- True
- False
Pregunta 3
Pregunta
What is acceleration?
Respuesta
-
speed of an object in a certain direction
-
the change in speed per second
-
the time taken for a change in speed
-
frictional force that acts on a moving object
Pregunta 4
Pregunta
What are forces measured in?
Respuesta
-
Newtons (N)
-
Kilograms (kg)
-
Watts (W)
-
Joules (J)
Pregunta 5
Pregunta
How can thinking distance be increased?
Respuesta
-
icy/wet road conditions
-
tiredness
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worn brakes or tyres
-
mass of vehicle
Pregunta 6
Pregunta
What is the equation for stopping distance?
Respuesta
-
thinking distance x braking distance
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thinking distance + braking distance
-
braking distance / stopping distance x100
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stopping distance - thinking distance
Pregunta 7
Pregunta
Work is done whenever a force moves an object
Respuesta
- True
- False
Pregunta 8
Pregunta
What is power measured in?
Respuesta
-
Joules ( J )
-
Watts (W)
-
Newtons ( N )
-
Kilograms ( kg )
Pregunta 9
Pregunta
What is kinetic energy?
Respuesta
-
energy when you stand still
-
energy an object has because of its movement
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increased speed of an object
-
a force of attraction between masses
Pregunta 10
Pregunta
Cars with a greater kinetic energy will have a lower braking distance
Respuesta
- True
- False
Pregunta 11
Pregunta
What do seatbelts do?
Respuesta
-
cushion the impact for the driver and passengers
-
absorb energy and break to avoid the driver being impaled during an accident
-
prevent people in the car from being propelled forwards
-
be a part of the car designed to crumple up during a collision
Pregunta 12
Pregunta
What do air bags do?
Respuesta
-
cushion the impact for the driver and passengers
-
absorb energy and break to avoid the driver being impaled during an accident
-
prevent people in the car from being propelled forwards
-
be the part of the car designed to crumple up during a collision
Pregunta 13
Pregunta
What do crumple zones do?
Respuesta
-
cushion the impact for the drivers and passengers
-
absorb energy and break to avoid the driver being impaled during an accident
-
prevent people in the car from being propelled forwards
-
be the part of the car designed to crumple up during a collision
Pregunta 14
Pregunta
What is the equation for momentum?
Respuesta
-
mass x acceleration
-
mass x velocity
-
force / time taken
-
mass / acceleration
Pregunta 15
Pregunta
At higher speeds, falling objects experience more drag
Respuesta
- True
- False
Pregunta 16
Pregunta
When a skydiver jumps out of an aeroplane, what does he initially do?
Respuesta
-
deaccelerate due to air resistance
-
accelerate due to the force of gravity
-
accelerate due to air resistance
-
deaccelerate due to the force of gravity
Pregunta 17
Pregunta
What is the height of a 160g cricket ball if it has 30J of gravitational potential energy?
Respuesta
-
18.75m
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18m
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10.46m
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5.3m
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